I've never understod the hype around Sgt. Slaughter, especially his early 90's run in the WWF/E. If I'm dealing with Slaughter and his prime, then it's easily his AWA/NWA/WWF stuff from the early 80's. The guy was a brute, I'll give him that.
However, Tito is better. Tito is a better "wrestler" in terms of ability, stamina, speed,, and I'd daresay int his match, probably strength. Slaughter is essentially a one trick pony, the Cobra Clutch (maybe the camel clutch), and I just can't see him getting them on Tito. I think it's a close match, possibly the good old roll up ending, but no one dominates.