Deca is wetter and NPP comes with less water retention. Due to the shorter ester NPP makes dosage adjustments easier and quicker. In case of any negative side effects NPP will be out of the system faster. Cycle length will play a part in which one is better suited in the cycle.
If you have never ran a 19-nor NPP is a good start.
In my opinion there is no better bulking cycle than the time proven Test/Deca/Dbol combination in moderate doses.
Good luck in your cycle planning.