Tren enth has a longer ester than parabolin, but both are about equal in effects. Think about Cyp compared to Enathate...Cyp is a slightly longer ester and prefered by many. Tren Enathate can be prepaired in 200-250mg/ml and easy to find. Parabolin was only 76mg/ml and was legendary at that. I am taking my own tren enanthate and I have veins head to toe, but a temper to match...