I own both...but am yet to drill up the Ace (Ive been very slack!!).
I have gone through 2 XXX, and my advice, DO NOT DRILL TO GO LONG...because it will go...and go...and go...and just go, doesnt move an inch.
My current XXX however is fantastic, although I must admit I was a little hesitant on getting it due to the experience with my 14lb one. I love the ball, it is nice and smooth, not hard to control either.
Jen