I think it's about an inch lower. The tires are definitely more "tucked".
HRC, they are Kosei K1's. Unfortuantely, they stopped making them this year, even though they are extremely popular on the track. By the way, I lose about 15lbs. each corner (60lbs total) by putting those tires/wheels on, in lieu of the 162's and runflats. There is a huge difference in accelleration, which caused me issues last year at autocross with 255's in back. I would spin the tires all over the place. The 275's and the suspension work (hopefully) will keep me a bit more planted.