The G90 is the Genesis brand's inaugural flagship. You may remember it as the Hyundai Equus. I drove the V8 model last year and was wowed by its true luxury offering. This time around I've got the twin turbo V6 with all-wheel drive, a popular build combination for those in the Snowbelt. Collecting glowing reviews, including one from me, and chosen as a finalist for Car of The Year, the …