There is literature that explains how the esters alter metabolism in the body. It has to. Anecdotal reports are unanimous that longer esters simply cause more water retention, but also more nitrogen retention. So there is a trade off and because of the shorter life, I'd dose the Test-P ED or EOD. Will need probably 30-50% more Test-P to get similar mass gains.
To stay hard and pack on a few solid pounds of muscle, Test-P and Mast-P, 1cc EOD would work well.