Here is my take on Record/Chorus levers. I have no experience with the other models:
QS refers to the left hand (front) shift lever. Supposedly it makes for a faster front shift with less lever throw. I never used one. BB is for ball bearing pivots in the shift levers as oppose to bushings. All Records have BBs. Ultra has a drilled out index gear and a plastic (carbon?) spring carrier. Also the shifts on the Ultra take a lighter touch. I prefer the ones that aren't Ultra. Also, when they came out, the Pros didn't really care for them either. So, Campy made a run of "Red" levers with a stiffer feel. Those are rare and expensive if you can find them. I have no idea what the Micron is, Carbon/BB was what was tagged on the 8, 9 and early 10 speed.
Last edited by gearbasher; 05-20-20 at 01:41 PM.