All wrong majin Vegeta = SSJ2 goku cuz goku sed so when he got to kami's lookout. he sed :"When i was fighting Vegeta we where evenly matched" so there u have it majin SSJ2 vegeta=SSJ2 Goku
You're repeating yourself. First of all, SS2 Goku (dead) > SS2 Goku (alive). When a character is dead their body is more durable, meaning they could probably put out a lot more power in that state than being alive, and take loads of more damage without wearing down as easily. That's one of the reasons Vegeta was able to pull himself up after every attack from Kid Buu. For another example, take a look at
Goku using Kaioken w/ Super Saiyan (3:00[min]) vs. Pikkon; "S-U-P-E-R KAIO-KEN!". That was filler, but it makes sense. Think about it.
Secondly, before snapping your "assumptions" at people, learn basic English, and read the entirety of people's posts before replying. Just some advice to the god darn Goku lovin' annoyances.