Adalogger 32U4 vs M0 - What's the diff?

[DarTC]

I'm interested in building a simple 3 axis accelerometer data logger and the Adaloggers look like a good platform to start with. The M0 is $2 cheaper than the 32u4 and at a glance the cheaper option seems more powerful. Anyone willing to explain the benefit of the 32u4?

[dastels]

None really. The M0 is orders of magnitude better (much faster, vastly more memory, 32 bit CPU rather than 8 bit). The 32u4 is a simpler chip which might be appealing if you are working in assembly language. But using C/C++ abstracts those details away. The 32u4 might end up significantly cheaper at mass production scales. But for single projects or small scale production you're probably better off going for an M0 chip (i.,e. the SAMD21).

Dave