I'm not sure. I don't have many problems myself with either and enjoy both. Although I have had more bad experiences at Fractal just because of (usually one DPS) ignoring mechanics. Just recently I had Dragoon that constantly ran into mines no matter how many times we told him he needs to avoid them. Couldnt heal through that. Eventually he left and we got a new dps but turns out the other dps' gear broke from all the wipes so we needed to abandon. Yep