Game play and customization option wise, I feel like the two games hit about even. However, the staff of Last Moon are also working on a new game so eventually there will be two different servers hosted here. Community-wise, Last Moon is /definitely/ superior to Feral-heart. I was in the Feral-heart community from the day of the game's release until late 2013 and it has done nothing but dissolve. Now Feral Heart is full of underage children and bratty teenagers.
There is somewhat of a small adult community over here in Last Moon excluding staff (and there is also another half of the adult community on the Royale Skies server) so I personally am happy here just for that reason by itself. All in all, I find this community much friendlier and open-minded to different /types/ of role-playing and ideas than Feral Heart is, a thousand times over. I've been here about a year now.
Anyway, welcome to Last Moon.