Will the 200mg make a difference?

As per my last thread. my mate has decided or running deca and sus for his bulk. Sus at 500mg and deca at 800mg But in saying that were starting to think its a little to much deca and 600mg may just do the trick. Hes looking at adding as MUCH mass as he can before he cuts down So maybe the 800mg is fine. Looking for first hand replys here preferbly peopel who have run deca at 600 and 800mg.