I prefer NPP much more then deca. The problem with deca is the EXTREMELY long half life and detection time. Deca has a half life of 15 days. Generally speaking, a steroid is in your body for 4x it's half life after your last injection. Deca is still in your body for 2 months after your last injection! That makes it really hard to recover from and very suppressive.
NPP has a half life of only 5.5 days. You get all the benefits of deca but it's out of your system much faster.
Deca - half life of 15 days.
NPP - half life of 5.5 days.
Deca less pinning, NPP hits you / out if your system quicker.
I like NPP as the old Deca dick gets tiresome after a while, nothing worse than wanting to bone everything in sight then when you are ready to get down you can't perform.
guys in the old days loved deca because injecting steroids was considered taboo, so injecting something once a week was very optimal
plus it lasts in your body a long time after stopping its use so you get a lot of bang for the buck.
today things have changed and a lot of guys like to use NPP cause they don't mind frequent injections and would rather the gear be out of their system faster
if i were to choose one, i would go with deca because i hate injections
It really just depends how often you want to pin. They are the same things, just different esters. I prefer long esters because I don't like to pin a lot.