Just threw some Pirelli Angel GTs on STella.
Different tyre gauge now, but I tried good old 43psi front and back, but handling was poor and dull.
Went up 2lbs and they became lively and how I normally expect STella to handle.
So yes... 2 psi can make quite a difference to your ride chaps and gals. Tyre life is also at its greatest when tyres are inflated correct. I.e. not too low or high. I can tell by the feel of the bike and steering if my pressures are on point.
Cheers, Diesel