I think I can safely say, that unless you are into high performance, you won't notice that much of a difference. I've only flown on 4.8Vs, so I don't have a view from both sides, but I will say that 4.8 V can make my profile in my avatar do some crazy stuff. I don't think faster response time or more torque would be required. Its a 40 size plane, scratch built if anybody cares.