As for the extra features - just by looking at these pictures - Iskra definitely looks more appealing and user friendly because of clear pin labels. I really hate looking up the Espruino reference just to double check where PWM or ADC is, and for that reason alone I would often choose Arduino for simple toy projects.
The good thing is you can get improvements/ideas like that back to Espruino when the time comes for your next kickstarter campaign - which I will happily support :)
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.
As for the extra features - just by looking at these pictures - Iskra definitely looks more appealing and user friendly because of clear pin labels. I really hate looking up the Espruino reference just to double check where PWM or ADC is, and for that reason alone I would often choose Arduino for simple toy projects.
The good thing is you can get improvements/ideas like that back to Espruino when the time comes for your next kickstarter campaign - which I will happily support :)