Just to add to this, I just tested this again and it looks like there's a software glitch at the moment which means that the Pico sometimes leaves the USB peripheral on, and ends up drawing 250uA when sleeping.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Just to add to this, I just tested this again and it looks like there's a software glitch at the moment which means that the Pico sometimes leaves the USB peripheral on, and ends up drawing 250uA when sleeping.
It'll get fixed in a firmware update soon though.
... but even so, it looks to be about 10x better than the DigiSpark, but it's hard to find exact figures on the Digispark.