On the ground there is a direct relationship between side-stick input and elevator deflection.
One the CEO this direct relationship blends into the usual Flight Mode (pitch rate demand) a few seconds after becoming airborne.
The NEO is different. The NEO introduces a Rotation Mode from 70kts during the takeoff roll, which is a pitch rate demand. So the whole rotation is pitch rate in stead of direct control. It aims to homogenize rotation across different weights and CG whilst also reducing the chance of a tails trike. Rotation Mode subsequently blends into Flight Mode about ten seconds after liftoff. I’m sure real Airbus aficionados can offer a more technically correct explanation.
In practice, you just notice that the CEO rotates differently compared to the NEO. I was skeptical at first, but looking back it is indeed more homogenous, none of these nose heavy departures you sometimes encounter on other aircraft.