I'm afraid those charts don't make any sense to me. I'm not much a car enthusiast... I don't think I'll be keeping the car much longer, it doesn't handle Canadian winters very well, and doesn't stand a chance in the mountains (I live near the Rocky mountains). I think I'll be looking to get an Escalade, Navigator, or RR in the next year or so. Escalades and Navigators are revolting machines -- I'd recommend avoiding. I'm not sure how they got tagged as being such "luxurious" cars, because they have all the fit and finish of a McDonald's Play Place.