Some configuration details to watch out for:
The most inboard CLE slat did not extend as much as the outboard slats.
There was a small fairing added on the inboard side of the engine pylon when the CLE wing was introduced.
On the CLE wing, for some reason, both slats on the folding wing panel were allowed to close when the wings were folded.
Note that the ailerons drooped downward on both the original and CLE wings.