I got the following from Quick Answer:
Quick Answer
The ODROID-M2 and ODROID-H4 are both single-board computers (SBCs) from Hardkernel, but they cater to different use cases and specifications. Here’s a comparative overview:
Processor
ODROID-M2: Utilizes the RK3588S2 SoC, which offers significantly enhanced multiprocessing performance, approximately three times faster than its predecessor, the ODROID-M11.
ODROID-H4: Features an Intel Alder Lake-N architecture processor, with options like the N97 for the H4 and H4+ and N305 for the H4 Ultra. This architecture provides higher frequencies and improved performance compared to previous models23.
Memory
ODROID-M2: Typically supports LPDDR4 memory, which is sufficient for many applications but may not match the latest standards.
ODROID-H4: Supports DDR5 memory at 4800 MT/s, allowing for faster data transfer rates and better overall performance23.
Storage Options
ODROID-M2: Generally has fewer storage options compared to the H4 series.
ODROID-H4: Offers up to four SATA ports (in the H4+ and H4 Ultra), allowing for extensive storage capabilities, which is beneficial for NAS setups and other data-intensive applications43.
Performance
The H4 series is noted to be around 36% more performant than the previous H3+ model in single-threaded tasks2. This makes it more suitable for applications requiring higher computational power.
Use Cases
ODROID-M2: Ideal for general-purpose computing, media centers, and lightweight server applications.
ODROID-H4: Better suited for high-performance computing tasks, NAS setups, and applications requiring extensive storage and processing capabilities.
Conclusion
In summary, if you need a board for general tasks with decent performance, the ODROID-M2 is a solid choice. However, for applications that demand higher performance, better memory, and extensive storage options, the ODROID-H4 is the superior option.
References
ODROID-M2 – ODROID - Hardkernel www.hardkernel.com
BLOG – ODROID - Hardkernel www.hardkernel.com
ODROID-H4, H4+, and H4 Ultra: Next-Gen SBCs for High-Performance Compu www.picocluster.com
The ODROID H-series is growing with three brand new www.hardkernel.com
The forum in your Google post is my 4th result.