The Deluxe QS is probably the best, although I can' t say for sure, because I don' t own one. Dave C. on these forums said he had a problem with the lower right fletch hitting the support when shooting cock vane up with the Deluxe. I don' t know if anyone else has had this problem. The QS feature is very nice, and the bristles seem to be softer and quieter than the older original style.
Right now, I have two original style Biscuits, and a drop-tine, all with the QS setup. I personally prefer the original to the Drop tine, since it is much easier to fine-tune. With the Drop-Tine. there is only one height which will get the biscuit perfectly aligned with the bow string. I prefer using a tied-in nock point, so the lack of adjustability is a problem. If you use brass nock sets, it probably is a non-issue, and the greater ruggedness of the Drop-tine would be an advantage.
I will most likely pick up a Deluxe QS for my Bowtech, to see if it is a better mousetrap.