I ran Stan's last season, and I just put on new Schwalbe Racing Ralphs and trying the Orange Seal.
I have heard from some reputable sources that the Orange Seal doesn't break down as quickly and handles larger holes and cuts a little better, but it's too soon to tell. One thing I have notices is it gets bonded around the presta valve mechanism inside, so once it get's slow to inflate, I pull the valve and a little ring of hardened sealant peels off. After that everything is fine.