Re: 'Nashville' TOM bridges
Nashville is a little bigger, a little heavier, and mounts on studs that thread into a bushing mounted in the guitar body (similar to tailpiece bushings & studs).
The ABR mounts on little threaded wheels that thread onto thin posts that screw directly into the wood.
I've had both, I like them both but prefer the Nashville because of the extended adjustment range and because the mounting is sturdier. It is possible to bend the studs on an ABR, and you can even bend the bridge itself over time. It's pretty near impossible to bend the Nashville bridge or studs unless you stomp on the guitar.
I have pretty sensitive ears and don't think either sounds better or worse.