The Rough Ride is nothing like the Dyfi, although it is a good one.
Dyfi – Steep, slated, forestry descents with easy gradient climbing.
Rough Ride – Open moorland with fast, non-technical descents and some killer climbs.
The Beast is OK, but lots of road. The Brechfa enduro is good, using the man-made trails in the forest but also some other bits. To be honest there isn’t really anything like the Dyfi. Not anymore anyway, if the Blackmill Ratrun comes back, then thats the closest thing.