Well managed to get both trails in, and two dissimilar trails you'll not find! Both deadly.
Roscahill, fantastic trail, rooty narrow, twisty, nothing to steep or technical either up or down, just lots of really cool single track and "natural terrain". Thats not taking away from the Connemara MTB crew who built and maintain it, some great work gone into that, but it has a natural forest feel that I really like similar to
http://showme.co.za/knysna/tourism/h...e-cycle-route/
Bit Schlompy in places, not quite a donkey festival (although there was one nearby)
Derroura on the other hand much more "man-made " feel to it, similar to Ballinastoe and 3 rock Metro's, hardpack rocky single track, very fast flowing but you'll be glad for good small bump settings on your forks, great views, fantastic switchback corners.
Personally I preffered Roscahill so thanks so much for the heads up, but I'll happilly visit Derroura again, got a Strava segment to improve on :) all in all a great evening on two new trails I'd never done before, loved it!