V20 is too expensive for me so I'm also trying to decide which phone to upgrade from the G3 and G4. I really like the size and feel of the V10, but would I wish I had opted for the faster processor in six months? Also considering the Moto Z Play because of the battery life...
G5 also has fresher software compared to V10. Just don't know if I should give preference to wanting a bigger phone or just go for the faster phone since lag and slow down have been issues on the G3 and G4 more than I'd like. V10 has the same 808 as the G4, but maybe it's optimized better?