I personally don't understand the difference between the two, I only tested with my projects and relayed the problematic results here. I was going to use raknet instead, but Enet is free and open source it seems.
As for the difference...I think ENet is more sophisticated and includes much of which will just take you more time to develop (such as reliability, and a few other features).
As for the difference...I think ENet is more sophisticated and includes much of which will just take you more time to develop (such as reliability, and a few other features).