Hmmm... Necks are always of interest to me as I sell more guitars cause the neck is too small. 4 very similar yet different guitars and the pickups have varied over the years in all but the Casino. It hdad and still has the P-90's. CB - your description on the pups and the other hardware is right on, but back to the necks...I will start with trim level from lowest to highest.
Dot - They vary but overall come closer to the fatter 50's style Gibby neck. Semi-Hollow 335 style Body with Generic Humbies.
Casino - Fast, slim neck 60's style. P-90 pups. Full Hollow-Body 335 style.
Riviera - Fast, slim neck 60's style. Full size and Mini Humbies. Semi-Hollow 335 style Body.
Sheraton - Fast, slim neck 60's style. Full size and Mini Humbies. Semi-Hollow 335 style Body.
Something for everyone.