I just got the NP-v80 (for family campfire type jam sessions) and I suspect the key width is smaller. I quickly went back to the specs on the NP-31 and its boasts about having full size keys, now i notice v80 does not boast about this.

Can someone who owns NP-31 please measure the overall length of all 76 keys.... Also maybe give me a octave measurement

Its going to bug me forever otherwise... i thought I was buying a step above the NP-31

Motif XS8, MOXF8, Hammond XK1c, Vent
Rhodes Mark II 88 suitcase, Yamaha P255