That's probs cos the Pro is probs the only decent one they make in my opinionated opinion hahah
It doesn't suffer from the excessive distortion or sibilance the more expensive ones do including the elliptical tips. They also track a lot lighter too as you say, I found them the most usable out the whole range.
The black ones were more intended for mono records, 25um stylus radius.
If sound isn't that important for DJ'ing why spend a lot of money on a decent front end i.e. Bozak and expensive speakers if all you are amplifying is crap?
--The future scares me, any chance of a lift back to the past any one?--