90% of the guys who have used it, will tell you to go with Tren Ace for your first time.
WHY? Because if it is TOO much for you, it will be out of your system very quickly. Whereas Tren Enth will take a bit to hit and stay with you for several days.
As far as results... most go with ace, but others prefer enth claimimg it is smoother, sides less intence than ace. Plus if you don't like to poke ED or EOD, Enth is a 2 pokes per week cycle.
Personally, I prefer Ace when running Tren, because I run Test Prop and Masteron with it. I actually look forward to the pokes.
A tren cycle is a differant animal.... first-timers - go with Ace.