I love the Cube. It's such a great looking bike. You're right that it's frame is slightly lower and longer, but not by much (the wheelbase is the same, too). But the pad measurements are probably only a significant improvement compared to the P5 is you exclude the x-lo setup (mentioned by Eric above) or aftermarket bars (what I have).
The bikes lower on the list have a longer and lower frame and don't need an unusual cockpit to reach some of these pad numbers.
The bikes lower on the list have a longer and lower frame and don't need an unusual cockpit to reach some of these pad numbers.