Hi.

Fitting the bridge on TLs can be a bit awkward as the pickup cavity often needs enlarging a bit to locate the bridge in the correct place. But saying that, as long as you have a Dremel with a rotary drum sander bit, then it's a matter of moments to do. Otherwise its pretty much the easiest kit to assemble, though the GSJ-1 SG Jr kit is also very straightforwards if you don't mind glueing the neck in place.

A lot comes down to the type of finish you are looking for. For a natural or stained finish, the GTL kits have better wood and normally have well matched pieces that will give a consistent look (though they are a bit more expensive as a result), whilst the TL ones can be a bit more varied in wood selection. With the TLs, I'd start by assuming you'd do a solid colour, and maybe go natural if the body you receive looks nice.

A rosewood board kit is a bit easier than a maple board kit, as the board itself doesn't need any finish, whereas a maple board needs some sort of finish, and that will finish will need sanding and polishing if you go for clear lacquer on the board.