I would go with sust over Test c or e. There is way more than i can write but in short You get an overall more complete testosterone with sust. The diff esters have a diff effect on the body. You will also have the choice to pin 2x a week, 1x a week, 1x e2week and you will still have a relatively steady serum level. As a continuous TRT you will have a stronger impact from the 100mg of long undec ester that builds up and has a stronger effect overall.