I use my OC daily, regardless of growth. I've only used a open come NEW and a tech so the OC is definitely more aggressive. MY OC wasn't too aggressive for me to learn with, I think I found it better than the tech tbh.
The safety bar (what is commonly mistakenly called a closed comb) seemed to plow the lather out of the way for me, I feel that it's a slicker shave of my 2 razors. That being said I do get good shaves with the tech, but I only rarely reach for it.