Some balls seem to roll thru the rack differently than others. Even though I had a heck of a time trying to match up to the core, the Train had a hit that made me fear that I was going to break pins, and I don't throw it hard enough or with enough revs to break anything. Looking forward to the Pure.
Another ball that has a very hard hit to it is my Network. The CFT core rolls great thru the rack.
Also, if I didn't mention the Black Eagle, I would be remiss. If you've never thrown a ball with the Break/Eagle core, you have yet to fall in love.
Now, to get off of the 900 Global bandwagon, some balls that I've seen thrown and I think to myself "Wow, those have an off the chart hit"
Sinister - I almost changed over to Roto Grip for this ball. The Cage core is pretty awesome looking.
Hyper Cell - There is something to be said for that core..
Covert Revolt - Ball reminds me of a V2 motion with a ton of hit.