I have to add air much every week to both bikes, on the Beeza it doesn't seem to matter much at town speed can be down to 15& 20 and still rides fine, but last week put them up to 32/35 and noticed a difference.....(from the usual ~28/~30)..
However- the Gutzzly is far more sensitive, probably due to heavier, but feels road surface more as they wear, especially when the surface has been profiled for re-surfacing, and the over-painted lines at light-intersections...
I also noticed a change in wear patterns from my daily riding in the country (up/down a windy range- edge wear front goes 'pointy'), to daily riding spending more time in town- more braking-front is flatter
The head-stock bearings can also make a difference if too tight or loose....
All in all, good pressure is one up on low pressure, and new tyres are up on that...