I’m in the screw clamp camp. Ten of the Festool and 6 of the Axminster knock-offs. I like the Axminster better because of the grittier texture on the bar, the head doesn’t slip. A couple of the Festool’s do creep on the smoother bar.
The smooth painted wood handle is fine with me but I usually wear nitrile gloves and they provide plenty of grip. When used with the guide rail little pressure is needed. Also, with the very narrow bar when used without the rail my concern is avoiding leaving an impression of the bar in the work.
I did finally buy a pair of the Bessey ratchet clamps when I found some at a good discount but due to the extra cost, extra clearance required, bulk (storage space needed), weight, and moving parts I won’t buy any more.