My 85D was at the SC today for a 12V battery replacement. They drove out to my residence, loaned me a 60 for the day, then returned my car at the end of the day. I drove the 60 about 70 miles, on local streets, highway, and a curvy mountain road. All I can say is if the 60 were my original test drive, I would not have been wowwed, and may not have purchased a Tesla. I'm not performance-crazy (otherwise, I would have opted for a P85D), but to me, the 60 drove very much like an ICE. Or maybe I'm just spoiled now by the 85D. Also, I did notice a significant difference between air and coils. I don't know how much the 70 differs from the 60 in performance, but do yourself a favor and test-drive both if you're shopping for one.