The Kaos is an old pattern/sport design. It will do a better job at precision aerobatics. The Uproar is more of a fun fly type of plane. It won't feel like it is on rails or have near the precision as the Kaos but it will do some pretty wild maneuvers. It it also has a big thick wing that will likely allow it to fly slower. So they are both extremely aerobatic, just two different styles. It really boil down to the kind of flying you are into. Personally, I've tried fun flys like the H-9 Twist, U-Can-Do, Profile Hots, and others. They are fun but a plane with more precision handling and higher speeds appeals to me more lately.