Man I get sick of the ester debate at my gym, that sust will make you stronger, and prop will not give you as much water retention, its all bullshit, test is test, just a matter of the blood levels you maintain, by the timing in which you administer doses of varying esters.
If you take 200mg of test without an ester directly into you blood stream IV you will have 200mg in you blood that week, may be gone in a day, but you had 200.
if you use 1 sust 250, you will after a week still never have had 200mg of test released into your blood. but what isn't released will be building up and releasing later. So you will feel those effects of higher blood levels later.
once the ester is cleaved off, all test is just testosterone in the blood, or wherever it is attached to a receptor. there is no difference.
a guy asked me once where he could get straight propionate without the test, what a laugh. You couldn't have a propionate without a parent molecule, only a propanoic acid. that would do you no more good than butter.