they are very similar but I think NosEther has some extra goodies, for sure it has ribose which is not in the NosPre/Ether stack. I am actually using all three as part of my PCT as I really wanted to retain my strength gains, and so far it is really delivering. I take the recommended dosage for NosEther, added choline citrate; on the times I am supposed to dose just one scoop, i throw in a full serving of NosPre/Ether.
I have to give it to Chuck, I have become a GetDiesel believer. My past pct nothing got my libido back until I tried DTH; now it's my testbooster of choice for this pct. I switched from Leviathan to R4W as it is a much better pre-workout booster, the NosPre/Ether stack worked better that any other pill-based NO product I have taken, NosEther really rocks and is finally affordable, and for my next cycle I am incorporting CoqDiesel to keep libido on while on.