Neither. Short esters such as test p are known to cause slightly less bloat although can be less anabolic. But to me the difference is minimal. If your worried about bloat then your diet is everything. Sodium needs to be present but not high as that will bloat you. Lots of water to flush out your system will help. The introduction of an AI such as arimidex/aromasin will keep bloat down on testosterone. Too much of an AI is a bad thing though. Vitamin C is great for bloat too... preferably 2-4g on cycle.