Old post but let's do this 4 future generations the answer is no, CH1 steerings are the same size as EK9 or CL1, however the only difference is red stitching on EK9 ones, and CL1 have yellow logo on it. And the price of course, yellow, red, whateve.. color can make things more expensive..at least for Hondas.. lol.
All of those are compatible with each other, but beware for DC2 ones which looks the same but uses different splines and will not fit..