i made a thread that is kind of related to this in general section, but not a lot read about it, i was talking about the sudden boost of cards when pride decided to enter US soil... anyways.
Just by the number of fights, shockwave is obviously overwhelmingly better than ufc66, but everything depends on who fights who. For instance, arona vs silva would be not so great, even if they are top 2 of pride. Griffin vs Jardine would probably be more interesting than that fight.. But in any case, shockwave is going to be the best card ever for a non grand prix event, no matter who fights who.