That's not just the fact that he praises Messi. I think that Bale actually fits more to Real Madrid than Neymar. I find him a bit similar to CR7 in some aspects - he is fast, strong and tall, but he needs A LOT of space to fully use his good sides. That's why he will be useful during counterattacks. On the other hand, I don't think he will improve or change Real's style in any way, because with him they would still play badly against teams that keep their whole 11 close to their penalty area, because Blancos don't have a chance to start a counterattack then.
Some people would say that Neymar has the same problem with space on the pitch. Maybe a little, but he has a huge advantage when it comes to his brilliant dribbling skills which can really help him adapt properly in La Liga.