These micro:bit look pretty interesting from an embedded controller perspective - does anybody have any useful comparisons between them and others, eg Arduino e

These micro:bit look pretty interesting from an embedded controller perspective - does anybody have any useful comparisons between them and others, eg Arduino etc? I've been working on a project where I will end up having to make a simple stepper motor to drive an analogue clock and I think I can use this to control it (advance x% of turn every minute, currently x=50) though I was initially thinking of a small PICAXE circuit as we have some equipment at the school I work at. I like the thought that I could access it over BLE though, and that it could be programmed to handle DST automatically and even drive a few LEDs for good measure Also, what is the power consumption? As my project involves a clock, I'm thinking it needs to last a while on some batteries, though at least its big enough that I can pack a few in.