Your question includes a nice summary of some of the differences between a V-twin and an inline four-cylinder, but tire pressure is not one of them. A sampling of recommended tire pressures in the owner's manual shows that Ducati does list lower numbers for the 1198 compared with other manufacturers: 30-33 psi front and 32-35 psi rear for the 1198 vs. 36/42 psi for, as an example, the Kawasaki ZX-10R. But other twins have equally high pressures: 36/42 psi for the Honda RC51, and 36/36 psi for the KTM RC8 (36/42 psi with a passenger). Here at the magazine we've long used a single setting with variations based on machine weight, load and conditions, but never engine configuration. And for track use we base pressure on the tire manufacturer's recommendations, which is almost always independent of what bike the tires are mounted on. I also called Corey Neuer at CT Racing (www.coreytaylorracing.com), Pirelli's West coast roadrace distributor, who says "We adjust pressure for conditions and compound, but never for something like a Ducati vs. a GSX-R1000."