Not much at all and definitely not enough to make a difference good or bad either way.
You'll find a dozen guys say that test-e bloats them a little more than cyp but for that dozen you can find 12 more who say just the opposite. The "Bloating Factor" is in most peoples head.
There is a difference in the half life of each, something like 48hrs or so but both have a half life that's over a week long so that small difference isn't even worth noting.
Another difference that doesn't really make a difference, one is basically the European version and the other the U.S. version...at least when it has to do with where they started out.
The long and short, you're cycle will go exactly the same using either one...assuming it's real testosterone and not fake or heavily under dosed. So your best bet, go with the one you can get the best deal on.
