SSJ4 Vegito

I don't think Evil Buu= Kid Buu though. I mean let's not forget that Goku stated he could have beaten Fat Buu right before his fight with Kid Buu. Now you might say: "Well Goku never experienced Fat Buu's real power" well even if he didn't you forget that SSJ3 Goku's power was able to be sensed from Supreme Kai's Planet. Where as there is no indication that Fat Buu (When extremely Pissed) could be felt, only after Super Buu is formed do Supreme Kai, Goku, Gohan & Kabito acknowledge his growth in power. So that to me says that Goku couldn't feel his power from that far away meaning that it's weaker than SSJ3 Goku's since his power could be felt from the Supreme Kai's world. Now alot of you can may think that there isn't anything to suggest the fact that Fat Buu lost power however, Evil Buu's power could not be sensed from the otherworld, either and since there's a considerable difference between Evil Buu and the other Buu he fought then he probably should have been able to have been felt remotely, so that's why I believe Fat Buu>>Evil Buu>>Good Buu sort of how Kami & Piccolo split while Kami didn't change form he was still weaker, I guess its something like that since that makes the most sense to me. So I'm going to say SSJ3 Goku wins this fight especially considering that he now Knows more about the chi drain on his living body. So I think he'll be extra careful, when it comes to fighting Evil Buu add that to the power advantage I think he has and I think SSJ3 Goku would win, but not "Instantly".