Excellent points have been made above with your questions. I have used both with test/dbol and seen excellent results with either one. Let's make it simple: If you like hardness, vascularity(assuming bf is low enough) and immediate strength gains, fina is your boy...If you're after a slower acting, less androgenic drug, with equivalent if not more,imo, strength gains, go with the deca...You will be hard pressed to find a better all time classic stack of dbol/test/deca...you just cannot go wrong with this and a well planned diet....