Well, firstly I'd hold off putting too much stock in the exact shape of the curves until we have some verified dyno graphs to compare. That said, assuming these do represent the true difference between the 1198 & 1199 then yeah, about 7500 rpms is where the 1199 really gets going. The curve is a touch flatter than the 1198 below that; it's not going to feel feel gutless down low, but where the 1198 is very linear in how the power builds, on the 1199 you are going to notice it when you catch the big wave...
Not at all surprising really considering the extremely oversquare nature of the Superquadro engine. It's built to rev, and it'll spin up a good bit quicker than the 1198. They didn't have any other choice if they wanted to make competitive top end power with the likes of the latest I-4s. It may have the most oversquare engine on the market (ratio of bore to stroke), but it's still got a centimeter longer crank throw than say, the S1000RR (half that vs a Fireblade). So it'll still be gruntier and not as rev-happy as the 4 cylinders, but it will take on something of that feel they have when they get their lungs open. Not a bad thing in my book, though I suspect the rush may prove addictive!
As for rpm in 4th at 80mph, that was just a random choice. The money gear at that speed would really be third; with stock tires/gearing at 80, the 1198 would be turning about 6700 revs while the 1199 would be doing 7200 & change. If you were really serious (or on track) you'd be in 2nd at 80, turning 9000 revs, making 170hp and praying the DTC is going to save your bacon.
Coincidentally, the 1199 hits it's max point on the HP curve in 6th right at 300kph (186mph).
I see you have an 848; I'd say the operating rpm range on the 1199's going to be a lot like the 848, so you're already set. Or would be if your 848 weighed about 250lbs...