I can not confirm for sure because I have not personally thrown the Crux, just going based on the dozen or so I've seen thrown.  In my opinion I think the Crux would be a little early and stronger in the midlane, providing more overall hook while the Dream On, from personal experience, starts a heavy roll in the midlane and has a little more downlane response.

I would agree that the Dream On has more down lane reaction than a Crux but a Crux seems to be earlier.  Balls are close but yet different.  I think the Dream On give you a little more versatility than a Crux due to more response down lane.  Good luck in your search.

I have not thrown the crux but I have bowled against an aposing team that had 2 guys throwing them on  pair.  My Dream On out hooked both of there Crux and i had a much better 3 game set of theres as well.   they was lucky to shot 620's where my Dream on was a little touchy the 1st game with 2 splits going 215 with 2 opens. 2nd game i hit the pocked and didnt carry well for yet another 215  3rd game I made a slight ajustment moving even more left ( standing 40 now ) and threw out to the 13 board at the arrows and went 299 the last game   this ball is all that and then some,  after we was done bowling 1 of the guys throwing the crux was disapointed thinking he bought the wrong ball.. I told him I think he did as well, of course I did that with a big grin on my face...  great ball 900  2 thumbs up here  because there not needed for any of my equipment 

How do you stand 40 and hit 13 at the arrows?

By drifting about 15 boards right???