There is no difference between ANY testosterone product outside of release periods. It doesn't matter if you have test cyp, test prop, or sust (a cocktail of esters), it is the same shit. It doesn't matter if you have vet grade, human grade, or fish grade, testosterone is testosterone and the ester is not going to change the grade.
I hate seeing people who don't know their ass from their elbow trying to tell others how one testosterone has less sides than another or one gives better gains... ALL TESTOSTERONE IS THE SAME. Now, don't get me wrong, since propinate has a smaller molecular weight, it has more testosterone per ml, but the test in test prop. is the same shit as the test in Sust or Enthanate. The ester DOES NOT CHANGE THE PROPERTIES. AND YOU WILL NOT GET LESS SIDE EFFECTS WITH SUSTONON.
You will get gains from ANY testosterone that you inject (because it is all the same). However, Sustonon has a blend of esters. ALL of these esters start to be broken down by esterase enzymes at exactly the same time... seconds after an injection. Sustonon has prop which is broken down very fast... the rest of the esters will stay in the system for long periods of time.... the deconate/undeconate in sust/omna will be in the system for well over a month. This has a cumalitive effect. The prop leaves the system in a few days, so sust must be injected EOD for best results -best results result from even blood levels.
HOWEVER, there is a cummilative effect from the slow breakdown of the long esters. After a 10 week cycle of sustonon, you'll have elevated testosterone levels for two months post cycle. Since all of this synthetic test hasn't left the system yet, it gives the uneducated user an illusion that he has kept more of his gains from the sustonon. But actually, he's probably going to loose all of his gains within the next six months because the sustonon has suppressed his HPTA for so long that it takes months to recover and begin producing natural testosterone.
All testosterone is equal, but sustonon is the worst combination esters that one could use if his goal is to avoid side effects and get the most from his cycle becuase of the UNEQUAL HORMONE LEVELS. If you want to keep your levels high and even, go with enthanate, cypionate, or propinate. Don't combine them. Sustonon has its place in the medical community, but was not intended for bodybuilding.
-Stew