Update: Fiesta/Focus Fest at SFR SCCA event in Marina, Calif. Two Focus STs: One on 17-inch 255/40 Rivals, Konis, rear bar, relatively inexperienced driver; the other has a bar and 245/45/17 RS3s but no shocks. Two Fiesta STs: One on 225/45/16s; mine on 215/45/17s with Eibach rear bar. Course was not open enough for gearing to be an issue, so no answer on the 16/17s question. Fastest, by a bunch, was the Focus on RS3s, with a 40 flat by Mark Scroggs, who's one of the better Focus drivers in the country. I got it to a 40.4; Shelly Monfort -- who has more National jackets than fingers --- was a 40.6 or so. We all also drove my Fiesta; Mark again blew us away with a 40.5; Shelly got it to a 41 flat; I ran in cooler, misty weather and got to a 41.2. Drivers in the second Fiesta were a little back, but they came out of an SM Evo and have a few issues to work through. They will be fast, soon. I imagine Mark probably took top pax for the event (he raw-timed every Street class), but haven't seen results. The cars are so amazingly different. Everything in the Focus is sharper, but it oversteers not just midcorner but on entry, too. Shelly spun it once, almost spun another run, and I did the same. Takeaways on the Fiesta: The narrowness of the car compared with the Focus is a huge advantage. Bigger than we had thought. Even with the bar, the car does not oversteer in any way the Focus does. The bar helped, but not until I bled the rear tires way, way down (we finished at 42/31). We went as high as 48 in back but it didn't want to turn. The FiST isn't nearly as crisp on turn-in or in transitions. I don't see how a 50 series tire would help in this regard. Even the 45s felt a tiny bit mushy. We all agreed the 215 Dunlops were overwhelmed. Mark and Shelly both thought different tires -- and more tire -- would help immensely. And they both said the car was much less work than the Focus and close enough to be in the hunt nationally. So, nothing definitive, but we were all faster out of the box in the Focus.