OP, unfortunately I can't give you quantitative measurements, so feel free to ignore this
But here's what I've experienced, Litespeed vs. Wilier:
- In the saddle, not climbing, relatively little difference (possible none)
- Out of the saddle, high power (flat) - faster acceleration and terminal velocity on the Wilier
- Out of the saddle, climbing - faster speed on the Wilier
The difference in frame stiffness is significant between the two, the Wilier responds IMMEDIATELY. But the difference is more apparent at large power levels - when spinning, it seems to largely disappear.
The Wilier is more comfortable on rough roads, and the Litespeed with carbon fork is pretty good at that.
Cheers