I have since had the same question since I too was considering getting another seedbox. I originally had a seedboxes.cc seedbox and then migrated to the seedbox from feral. I will weighin and say speeds are around the same. when it comes to features and interface. Feral is somewhat lacking. THe one positive is has is that it allows you to pay with bitcoin. Feral also supports openvpn. Seedboxes.cc has plexmedia server integration and allows you to watch and play content directly from the server.

I say go with feral for security and Seedboxes.cc for media support and UI