Yes I am using the 30-10 now with the 21x12We or 21x13We (I have not made up my mind yet!) I dont have a lot of time on it so reliability wise I felt better to comment on the 25-13. Although I cant see it being any different.
Better....more power for certain....gives me more yank through the top radius which makes them easier to keep on size with the entry without a lot of work. If I had that kind of power with the 25-13 I would not have switched but there were a few times the 25-13 left me feeling I needed some more poop. Although I think most flyers would feel the 25-13 has superb power, but the 30-10 is a closer match to the Hacker.
Adam is still using the 25-13 and feels it is pulling his plane around fine.
Other side items, the motor has less controller induced squeel than the 25-13, its has a smoother tone to it in the air...and with the prop combo I am running now it is a fair bit quieter in flight.
Drawbacks....its slightly heavier (2 oz) and longer....thats about it