I'm trying to decide what rotors to put on an upgraded set of wheels. The SM-RT70 rotors (105) were stock. Can anyone tell me the advantage to the MT-800 rotors (Ultegra)? 160mm for either.

I see a small weight advantage to MT800's. Is there anything else I am missing? Also, would using the upgraded rotors affect switching between wheelsets (not planning much of this)?

Thanks.