Keep a clear shield on the RX-Q, so that's my daytime helmet and if I'm going to be riding around dusk/night, I'll use the Quantum II. Very pleased with both helmets and Arai service is amazing.
Only gripe I have is that the shields are nowhere near as easy to pop on and off as they indicate. I had to find a trick on YouTube which helped a TON.
once you get the hang of it, the visor is so easy to change, i had problems when i initially bought my RX-Q, but changing the visor is now literally a snap
Yeah, first time change are usually the hardest on Arai RX7. I remember breaking the one of the side pods trying to change visors. lol! Dealer replaced my helmet for free.