I see a lot of these either or threads and I gotta say, this one is a toughy.
If you can get a satin SARGE, that's what I'd go with personally as the TG isn't available in satin.
Otherwise I'd go for a TGLB black with black and tan handles like Andy the Aussie's. Ever since I saw that pic I've been drooling...
Either way you're going to have a sweet blade. I don't have a TGLB on hand right now to compare, but I think the SARGE is a teency bit lighter.
Functionality wise, I'm no expert, but I don't see a huge difference between the two. It might just come down to which one you like the looks of more. Also, in any case if you change your mind you won't have a problem selling/trading for the other.