Honestly, I’ve used neither. Did you use any of the official material to study CEH? If so, and if you’ve studied for OSCP, as well, I’d like to think you’ll be fine. IMHO, the CEH exam was not that difficult, and I’d taken it solely from reviews of the courseware, and long before I did OSCP.
Apologies I can’t recommend one versus the other, to you, from those choices.