I had a DDR/Wilson RRF collaboration flipper folder until recently (Traded it). Very nice knife & great F&F, but I will admit the one I had was a run of 25, indivisually #ered. I don't know about the Combat Elite line as I've never had one.
I've had the one mentioned & a "Mid-Tech" DDR Maxx Q1A, which was a great knife, too.
Both of the ones I had were manual flippers & worked/locked-up great. They were relatively light for their size & had very good blade length to handle length ratio. I believe the RRF was about 4 1/8" closed with a just over 3.25" S30V drop-point blade.
While the RRF was set-up for tip-up or down carry, the low-riding clip worked best in tip-down set-up, as quite a bit of the handle showed in tip-up carry.
As for the price, yes, they're up there, but like anything else, you pay for quality. I've heard/read that the limited run collaboration models were hand-fitted/sharpened, FWIW.