We're EFB only for the FCOMs and each aircraft can be looked up by it's registration. You'd be surprised at the differences beyond sharklet/non sharklet.
The old paper FCOMS covered multiple aircraft, had seriel numbers rather than our registrations, and different ranges for each system so you had to check that you looked in the 0 - 1500 or 1501 - 2500 part of the system you were interested in as appropriate.