Core M, at best, when the gods of heat and cooling are on your side, performs as well as a Haswell-generation (2014) Core i5 but there’s a huge range of throttling that can kick-in when things warm up. A theoretical maximum clockrate of 2.0Ghz is impressive but the base clock is just 800Mhz.
Steve “Chippy” Paine has some thoughts about Core M that anyone considering that CPU must read.
What he wrote really makes me wonder about the Core M tablets that are emerging from China. The level of engineering precision might be beyond the capabilities of the “cottage” companies and the hype for the China-brand Core M tablets might not match the reality of performance. Anyone thinking of buying one better do a lot of research. These are not tablets I will be posting about.