If there is one area that Shimano has over Campy it is in long cage derailleurs since their MTB components all fit into that category. I put an XT 10sp Dynasys rear derailleur on my commuter bike and I have an 11-34 cassette and triple up front and it shifts every bit as well as my Chorus and with a light touch too all the way up and down. It makes its way into their road groups.