Exactly right -- Velocity is a jQuery plugin and jQuery UI/CSS transitions replacement whereas Famo.us is a full-fledged app framework built around a physics engine.
As for a performance comparison, their demos have crashed my phone. So I have no idea. Looks like they've also pulled their demos link for now: http://famo.us. It's a pretty awesome concept though. I hope they succeed.
As for a performance comparison, their demos have crashed my phone. So I have no idea. Looks like they've also pulled their demos link for now: http://famo.us. It's a pretty awesome concept though. I hope they succeed.