Nandrolone Decanoate is Deca. Basically Tren has an Acetate and enanthate version available. NPP is the Acetate version of deca with a shorter half life. Deca Durabolin would be considered like a tren E with the longer lasting esters. Results should be similiar, but will vary based on individual, diet, and cardio. I would use NPP with prop and would inject EOD or ED instead of the 2x a week with deca.
Theres more research to be done bro...
Good Luck
Johnny