Interesting. I'm surprised one man can wear both.
I'm 6ft and 170lb and wear a large in most gear but a med Olympia AST fits me perfectly. It is fairly adjustable for fit with a belt and sleeve tensioning straps as well as extra zipper on the sides to adjust for lower girth.
As for my size L revit pants, they fit perfectly too but I do not have room for street pants under them. I sometimes wear them with a base layer though. Not a bad thing as the tight fit keeps the armor in place but it is not so tight as to be restrictive.
According to specs, the Sand shell is some mix of PWR|shell 500D, PWR|shell 750D, PWR|wax 1200D, and Lorica.
The 500D Powershell material Rev'It uses is MUCH, MUCH softer to the touch than the heavier feeling 500D Dupont Cordura Olympia uses. Subjectively the Cordura feels tougher and stronger but then again I have never crashed in it or sent it to a lab for analysis either.
I had a seamstress fix the torn seam my Rev'It pants for $20 and they should hopefully be good for a few more seasons use. I've removed the armor from my Olympia AST jacket and am currently using it again this year as a regular winter jacket. The Olympia jacket is now three years old and gets worn pretty much year round but is not showing any signs of wear.
I would recommend both Rev'It and Olympia gear although as I posted earlier I've found my Olympia stuff to be slightly more robust than anything else I've tried so far. I am still happy with my Rev'It gear though and would recommend it as well although I would give a slight lead to Olympia for value and durability. I've found both the Rev'It and Olympia products are light years ahead of similar products I've previously owned from Joe Rocket and Tourmaster. I've found both the Rev'it and Olympia gear are more durable, use heavier zippers, have superior hot weather venting systems, have a more accurate fit where the armor does not slide around, use warmer winter liners, use breathable waterproofing instead of vinyl coatings and use much more abrasion resistant textiles in the outer shell. At least to me the slightly higher cost for better quality gear was worth it and may turn out to be a cost savings as well due to increased longevity.