Riding a superbike is significantly more different than riding a standard. When I ride my Monster it's like I'm riding in my motorcycle, when I ride my 899 it's as if I'm ontop of it. The riding feel alone should let you lean towards the Panigale series. Sticking to Duc's is a good thing, the one thing Ducati nails right is making a big bike feel narrow with their V2 (L2) power plants. It makes riding I4, V4, H2's feel like riding a fat cow instead of a race horse. : )
The Panigale's are much more comfortable than the 848/1098/1198 series motorcycles. I personally think the 959 is a better buy than the 899 because of the 2 piece magnesium clutch cover and the slipper clutch. These two changes are worthy additions to the price badge.
If you're going to run the 899, use the clutch case cover protection because the 899 has a single piece clutch cover. It's a $667 part to replace vs the cover on the 959 which is just over $100 to replace in an accident. Not including labor.
The 959 will also let you use 1199/1299 frame sliders for this reason, but T-Rex racing also makes a cool frame slider that mounts on your clutch case and the 959/1199/1299 's don't get to use this option. It's kinda neat. : )
I personally prefer the looks of the 899/1199 over the 959/1299. That's just me. It's a great bike, go get one!
2014 Ducati Panigale 899
2014 Ducati Monster 1200