For example if it is the ease of use, the spray wax takes very little time to apply and probably much better durability. Then, since it is more expensive ONR is (35-40 a gallon) and ONRWW is $50, what would be the point in using it for weekly washes when it is unnecessary to apply wax every week/routinely after each wash. Or would it be something to use in addition to having ONR? For example using ONR for weekly washes, and then when it is time to get a layer of wax after a few months or so, do a ONR wash & wax to the car.
The wax in ONRWW would act as a booster to an already applied LSP since the LSP will slowly degrade after you apply it. OCW isnt cheap but the durability is excellent from my experience and lets say you wash your car weekly with ONR, then applying OCW every week is not only a waste of money but an overkill in protection since you can easily get a months worth of protection out of OCW.
However, if you washed your car every week with ONRWW and had no LSP on your paint, I would assume that the wax/polymers in ONRWW would be enough to protect your car without ever having to wax it.
Bottom line is that neither ONRWW, and to some degree OCW, will replace any wax or sealant. ONR doesnt strip wax so you would be fine with maintaining the car exclusively with regular ONR and waxing at regular intervals. ONRWW would just extend that interval to a longer period before another coat of wax is needed.