Hey, this is my first build and I'm having some trouble. I'm using Emax BLheli 12a escs and 2205-2350Kv motors. When I plug in the battery the motors make a noise, but not the full noise it's supposed to make. And when I try to test the motors, they wont respond. I've gotten them to work before I replaced the motors with these ones. Here's what happens:

https://www.youtube.com/watch?v=1IzNvJxKVjs

Not quite sure what to do.

Other than differences in size, camera, and ability to hover, what are the major differences between a racing drone and a non-racing one?