Raspberry Pi vs Raspberry Pi Pico: What's the Difference? Computer or Microcontroller? A Hong Kong Buying Guide (2026)

Both are called "Raspberry Pi", but the Raspberry Pi 4, Raspberry Pi 5 and Raspberry Pi Pico are two entirely different kinds of product: the former are single-board computers that run an operating system, while the Pico is a microcontroller, in the same family as Arduino and ESP32. Many beginners assume the Pico is a "shrunken Pi" and only discover after buying that it can't run Raspberry Pi OS or Linux, and has no HDMI output, so it can't be plugged straight into a TV or desktop monitor the way a Raspberry Pi can — and the project stalls. Sun Cheong Computer offers both Raspberry Pi 4/5 and several Pico boards. This guide breaks down the differences between the two families, and pulls together the key buying points for Pi 4 vs Pi 5 and Pico vs Pico 2 vs Pico 2 W, so you can get it right first time.

🔍 Not sure which one? Quick summary:

🔵 Raspberry Pi 5 → a faster small computer (desktop, server, development, imaging)

🟢 Raspberry Pi 4 → general media centre, home server, learning; lower power and cooling demands

🟣 Pico 2 W → low-power IoT nodes that need Wi-Fi/Bluetooth

🟠 Pico 2 / Pico → sensors, motors and LED control that don't need wireless

The Biggest Difference: Raspberry Pi Is a Computer, Pico Is a Microcontroller

In short: a Pi is like a mini computer — it boots up, goes online, and can run a browser or a server. A Pico is more like a "small brain dedicated to running one program": once powered, it runs the code you've written, which suits long-running, low-power sensor reading or device control.

Raspberry Pi 4 vs Raspberry Pi 5: Which Computer Should You Choose?

📌 Specs compiled from Raspberry Pi's official specifications and major supplier data (verified 2026); different hardware revisions or batches may vary slightly, so check the individual product page before buying.

Raspberry Pi says the Pi 5's CPU is roughly 2–3× as fast as the Pi 4's. On lifecycle, Raspberry Pi states that the Pi 4 will remain in production until at least January 2034 and the Pi 5 until at least January 2036 — so for development and industrial projects that need long-term supply, both platforms have relatively long product lifecycles.

4GB or 8GB?

The Raspberry Pi 5 is officially available in five capacities from 1GB to 16GB, but Sun Cheong Computer currently mainly stocks the 4GB and 8GB versions, so we focus on those two here:

• 4GB: everyday light desktop use, media centre, Pi-hole, a light home server and learning — generally enough
• 8GB: more memory-hungry work such as running many browser tabs at once, multiple containers or virtual environments, image processing or local AI experiments (what you actually need depends on your workload)

Before You Buy a Raspberry Pi, Don't Forget the Accessories

The Pi 4 and Pi 5 are sold as bare boards, so you'll usually need to prepare a few more things:

• USB-C power supply: 5V/3A is recommended for the Pi 4; for the Pi 5, use the official 27W (5V/5A) supply — reusing a Pi 4 supply may not provide enough power
• microSD card: for installing Raspberry Pi OS and storing data
• micro-HDMI to HDMI cable: both models output over micro-HDMI
• Keyboard and mouse: needed for desktop use
• Case and cooling: when the Pi 5 runs under heavy load, we recommend adding cooling (such as the official Active Cooler or a case with a fan); the Pi 5 and Pi 4 cases aren't interchangeable

Raspberry Pi Pico Series: How to Choose Between Pico, Pico 2 and Pico 2 W

Sun Cheong Computer currently offers the following Pico-series products:

• "Raspberry Pi Pico RP2040 Dual-Core 133 MHz Microcontroller"
• "Raspberry Pi Pico 2 - Dual-Core 150MHz Microcontroller Board"
• "Raspberry Pi Pico 2 W - WiFi Bluetooth Microcontroller Board"
  

🔗 Link placement: Link each of the four product names above to its own product page.

📌 All four have 26 multifunction GPIO and USB 1.1 (device and host), can be developed with MicroPython, CircuitPython and C/C++, and support drag-and-drop UF2 flashing. Raspberry Pi states that the Pico 2 series is hardware- and software-compatible with the earlier Pico series.

PIO (Programmable I/O) is a signature feature of the Pico series: independent hardware state machines let you define your own communication protocols or signal timing (for example, driving a WS2812 LED strip) without tying up the main processor.

How to choose?

• Tight budget and only basic control needed, or you want to reuse the large amount of existing RP2040 tutorial material → Pico (RP2040)
• Want a faster processor, more memory and security features → Pico 2
• Need Wi-Fi/Bluetooth (uploading IoT data, phone connectivity) → Pico 2 W; note it's single-band 2.4GHz (Wi-Fi 4), with no 5GHz or Wi-Fi 6 support

Pico vs ESP32: How to Choose

Pico and ESP32 are direct counterparts in the microcontroller space. Each has its own strengths — neither replaces the other:

• Want to use Raspberry Pi's official documentation and Pico tutorials, or need PIO for custom timing → Pico series
• Need Wi-Fi 6, or Thread/Zigbee (Matter smart home) → ESP32-C6
• Need AI imaging/voice, or USB OTG → ESP32-S3
• Just need low-cost Wi-Fi + BLE → ESP32-C3 or Pico 2 W

🔗 Link here to "ESP32-S3 vs ESP32-C3 vs ESP32-C6 vs ESP8266: What's the Difference? A Hong Kong IoT Buying Guide (2026)".

Practical Buying Guide: Which Board Fits Your Project?

Pi and Pico Aren't Either/Or: Common Pairings

Many projects use both: several Pico 2 W (or ESP32) boards act as distributed sensor nodes, sending data over Wi-Fi to a Raspberry Pi, which stores the data, shows a dashboard or runs a smart home platform. This plays to the Pico's low cost and low power while taking advantage of the Pi's full software environment.

Five Common Misconceptions

1. "The Pico is a smaller Pi" — It isn't. The Pico has no operating system and can't run Raspberry Pi OS or Linux
2. "A Pico can be plugged into a TV or monitor and used as a computer" — Not in the way you'd use a Raspberry Pi. The Pico has no HDMI display output, but it can drive small display modules over interfaces such as SPI/I2C to show sensor readings or other information
3. "A Pi can read analogue sensors directly" — The Pi 4/Pi 5 GPIO has no built-in analogue input (ADC) and needs an external ADC chip; the Pico series has a built-in ADC
4. "A Pi 5 can reuse a Pi 4's power supply and case" — Not recommended. The Pi 5 should use a 5V/5A supply, and the cases aren't interchangeable
5. "GPIO can connect straight to 5V components" — Both Pi and Pico GPIO use 3.3V logic levels, so watch for level shifting when connecting 5V components

Frequently Asked Questions

Q1: Is the Raspberry Pi 4 still worth buying? Raspberry Pi states that the Pi 4 will remain in production until at least January 2034. For a media centre, Pi-hole, a light home server and learning, the Pi 4 (4GB) is still plenty, with relatively low power and cooling demands. You only need to consider the Pi 5 if you want NVMe, dual 4Kp60 output or higher performance.

Q2: Can the Pico 2 replace the Pico? Do old tutorials still apply? The Pico 2 keeps hardware and software compatibility with the earlier Pico series (per Raspberry Pi), so most basic projects and tutorial material can be reused. However, the RP2040 and RP2350 are different chips, so for specific libraries or more advanced material you'll still need to check that RP2350 is supported.

Q3: What's the difference between the Pico 2 W and the Pico 2? The difference is wireless: the Pico 2 W adds an Infineon CYW43439 wireless chip supporting 2.4GHz 802.11n Wi-Fi and Bluetooth 5.2, with all other specs the same as the Pico 2. If your project doesn't need networking, the Pico 2 is enough.

Q4: For a smart home, should I use a Pi, a Pico or an ESP32? Divide the roles: use a Raspberry Pi for the hub and dashboard; use a Pico 2 W or ESP32 for distributed sensor nodes; and if you need Matter/Thread/Zigbee, prioritise the ESP32-C6.

Q5: Does the Raspberry Pi 5 definitely need cooling? Light use may not need it, but under sustained heavy load we recommend adding cooling (such as the official Active Cooler or a case with a fan) to keep it running stably.

Key Takeaways: 4 Things to Remember

• A Pi is a computer; a Pico is a microcontroller — they're not "big and small versions" of each other. A Pico can't run an operating system and has no HDMI output, so it can't be plugged straight into a screen the way a Pi can
• The Pi 4 is enough for general use; choose the Pi 5 for more performance, NVMe or dual 4Kp60 — and budget for a 5V/5A power supply and cooling too
• The Pico 2 / Pico 2 W have a faster processor, twice the memory and security features compared with the Pico — choose the W version if you need Wi-Fi/Bluetooth
• Pi and Pico can work together — the Pico collects data, the Pi stores and displays it

Not Sure Which Board Fits Your Project? Talk to Sun Cheong Computer

Sun Cheong Computer has been rooted in Sham Shui Po for over 20 years. If you've read this far and still aren't sure whether to choose a Raspberry Pi 4, a Pi 5 or a Pico, feel free to WhatsApp us directly at 9319 5163, or visit our physical store at 246 Apliu Street, Sham Shui Po — our technical team can help match the right board to your project's requirements.

Further Reading

• "ESP32-S3 vs ESP32-C3 vs ESP32-C6 vs ESP8266: What's the Difference? A Hong Kong IoT Buying Guide (2026)"
• "Parent & Child STEM DIY: Build a Simple Motion-Activated Alarm with Arduino"