I'd also give the edge to Big Thunder over EE. It's overall a more polished experience, and my body just doesn't enjoy going backwards (not to mention that the structure during the backwards portion is clearly not being maintained to its optimal level and there are lots of random light leaks that now allow you to see enough to decipher that you are travelling through unthemed nothingness). While the themed parts of EE are very good when they are in working order, there are clearly places where the budget ran out. There are no parts of Big Thunder where you leave the mountain and wander around a field. EE does this *multiple times.*
Also, they finished the entire mountain when they built Big Thunder.
That said, both of them suffer the problem of underwhelming finales (at least in the US. Both international BTMs have actual finales whereas the US versions, like EE, just end suddenly without fanfare). MAYBE the Yeti was a killer finale when he worked, but you move by him so quickly that he would have had to have been moving quite dramatically to have registered with every rider.