I have both as well and I would say Sjax. He gets more passes from the backfield and is a beast. Don't get me wrong, I love portis too, but with Betts there snagging some touches, i don't see portis doing as well as Sjax. plus WASH is playing pretty bad. They might be down a lot and throwing more, in which they use betts more than portis.
HOPEFULLY, they'll end up 1 and 2 tho. teehee (wishful thinking??)
10 team / Keeper / 2QB 2RB 2WR Flex TE DEF
McNabb/ Griese / JP / Clemens
SJax / Gore / Julius / T.Jones
Braylon / B.Marshall / Cotchery /Hackett
Gates / Olson