Flip-up is perfect for me. No need to take off glasses during on-off.
Get fresh air when refueling hot days too.
Have 2 Schuberth C3 Pro.
Good for box headed persons.
It sit fine without gliding up in higher speeds sitting up.
My old not much used Shoei Sarron replica from 1989-90 was made for sport bikes leaning forward. After 140kmh it moved up.
Schuberth has another helmet to replace C3 Pro, C5.
My second (matte bronze) is not much used so I have for a decade or more.
My favourite blue/white match my K6 colorwise and my head loves it.
Often seen on food pics in the Frank riding thread