spl4tt I don't know, it's just faster and of drains less battery.
I just noticed some lags after new update, when blur is applied by default (can be turned off in developer settings - after that, no lags even with max resolution)
for now, combination for me to avoid font rendering problems and also lags - max resolution and blur turned off.
however, battery life is still questionable - I'm sure that High resolution gives more active screen time from same charge than Max resolution, but is that difference noticeable in everyday use - that's a question.
I'm ready to give up 30 minutes of screen time to avoid visual glitches.