AW has far outlasted OCW, in my testing. After 3-4 weeks, I was left with a very unfavorable impression of OCW's protective abilities. It seemed as though dirt/grime was "sticking" to my finish and was actually hard to wash off at that point. The surface wasn't slick at all and the wash mitt felt rough against the paint, as if nothing was protecting the paint at all. By comparison, AW has kept going for 2-3 months on the cars I've tested it on (some with literally no prior prep, just straight AW). The wash mitt glides across the surface again, and dirt and grime is not sticking to the finish again. For protective qualities, I'm gonna say that OCW can't really come close to touching AW.
In my opinion, I see OCW as more of a wax booster, as opposed to a true LSP. I feel very comfortable, however, with AW as a LSP on my car. It is going on 2.5-3 months on my wife's car, with absolutely no maintainence whatsoever to her finish. For a simple as pie spray wax, this is impressive to me!
Regards,
Mike