I believe the Nox board has better battery saving options and better board control in general. Personally, I love it (Nox) and actually go out of my way to try to put it in my guns (even when it's not drop in).
If you want to set off and go develop some grand new thing, you don't need millions of dollars of capitalization. You need enough pizza and Diet Coke to stick in your refrigerator, a cheap PC to work on, and the dedication to go through with it. We slept on floors. We waded across rivers. -John Carmack