I had to get a snootful of OC spray when I was a gate guard at my base. I didn't have much respect for the stuff until that day. Compared to CS gas during basic training, I'd rather deal with OC if my life was on the line. After getting baptized with OC, I was required to wail on a guy with a padded baton for 60 seconds before cuffing him. I did it, but all the fight was out of me after that. In my defense, it was a rather gratuitous dose and the instructor told me to keep my eyes open. Ouch.
As for CS gas, I was borderline incapacitated almost immediately and I barely got my chin strap on my helmet buckled. However, recovery time was much faster compared to OC.
Though they wanted to issue us Tasers, that never came to fruition and I'm fine with that. I know enough about it from second-hand accounts for my pleasure.