If all you want to do is bimble around day VFR with up to 3 mates then the NPPL is simpler merely because you don't have to faff around with the annual medical
You don't have to get an annual medical with a PPL. Once you've got the PPL you can forget the PPL medicals and fly on an NPPL medical declaration provided you don't mind sticking to the NPPL rules.
With the advantage that you can upgrade yourself to full PPL privileges any time you like just by going and getting a medical.