most people check both STRINGS and BASSES sections of the forum and it's a good idea to not double post/have one reference point for a question.
I'd recommend sticking with this one.
String through body or topload ??
lot's of theories, most accepted is it has more tension on bridge as mentioned before. Haven't noticed a big tone difference or sustain, but claims are made for increased sustain. If there is, it was minimal on my carvin and I didn't find it hitting me like a load of bricks between the two methods of stringing.