I would stick with the stricter discipline of Ballet.  At least for now.  You know, you simply could be in a slump, a plateau of sorts before breaking away from it, rising above it.  That is the way for many disciplines; someone reaches a point where they feel they're doing nothing but the same thing over and over again.  But, that is a dangerous thing to feel!  It is sometimes a turning point as to whether someone is going to continue, stick it out or....take a break, which can lead to the cessation of it entirely.

I do hope you stay with the Ballet classes you're taking now.

Good luck though, in your decision.