Re: Trembucker or standard?
It's best to get TB trem versions anytime you're installing it into a Fender or Floyd guitar.
The poles line up perfectly. Std spacing for Gibson/PRS/Schecter etc.
Personally, I've changed my mind on the subject though. On my Fenders and G&L, I don't notice any dropout from having the strings underneath the outer edges of the poles on std spaced pickups. I do a lot of pickup changing, so I got tired of having to own the right one. Nowadays, I use mostly std spaced nickel humbuckers, so they're interchangeable among all my guitars. I even keep Duncan nickel covers on hand, just so I can buy open coil pickups real cheap, then cover them with shiny covers.