Except that he said that Goku was number 1 after he admitted that he surpassed him back in Boo Saga, which clearly implies that he thought that he was number 1 before Goku proved him wrong.h0kuten said:He may be the number 2 now. But not before-hand for already stated reasons.Ryuzaki said:He clearly said that he's number 2 in the same statement. You can interpret it as a general power statement or he's just comparing himself to Goku for their rivalry. I lean towards the latter, though.h0kuten said:Vegeta may have room to toughen up because he isn't a Ssj3 and Ssj2 doesn't kill the body like Ssj3 does. So it's not impossible to see Vegeta closing in on Goku like he said he would.
Regardless Vegeta says strongest so it's not a reference to their rivalry.
Further-more, Vegeta wasn't portrayed as the 2nd strongest in Db Super. He didn't do anything of the sort.
Nothing wrong with that.
Moreover, he stated that he acknowledged Goku as the number 1 (a clear call back to his statement in Boo Saga), but won't stay number 2.
So, SSJ2 Vegeta = number 2 in Boo Saga.