Test is Test. The only difference between them is the ester. ie enanthate, cyp, prop, ect.. Sust is just a blend of 4 esters. You should get roughly the same gains from all of it. The ester is sort of a time release for the injection depot. Picture this, you do an injection of enanthate and it takes ( X ) amount of time it to reach the blood stream. Kind of like an iv drip. Now something like prop is fast acting, so picture a faster drip....
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