All cranks have the bearings in them pressed in already. The cups screw into the bb. The cranks/bearings sit on the cups, and a "screw" hold the 2 crank arms attached to each other through the bb. The sr cranks come with the ceramic bearings, which need a seal provided by the sr cups. If you choose to use the record cups, they do not seal the bearings and they will get ruined over time. The bearings on the record, chorus, etc do not require a seal. Therefore, the record cups go with them as they provide no "seal". All cranks work just as well with all deraillers and briefters so long as they are all 11 sp. If you choose to get ceramic bearings to replace the regular ones that came with your chorus cranks, for example, you would also have to replace the cups to sr cups. The cups are very cheap though. That is if you get the CULT ceramic bearings. Not the same with other aftermarket ceramic bearings.

That is how I understand it anyway, but DaveSSS is the undisputed all things Campagnolo guru". When in doubt, go with what he said!!!