How fucking rude are you?!
LOL, there's nothing rude about asking for details man.
Test-C is nearly identical to E in terms of effect. half life, etc.
However, something, still the subject of endless debate, changed in the way underground suppliers of Test-E raws were made, which has led to countless complaints of injection site pain. Worse, even when it's initially painless, by some yet undetermined mechanism, it seems to degrade over time even in the finished oil product, producing not just pip (injection site pain), but flu like symptoms.
Go look at the Chilton forum for the latest in an endless stream of "My Test-E was fine last year, now it's the worst thing I've ever injected and I have to throw the remaining vials away.".
Test-C does not have this issue.