The idea that the RC /99 is a more desirable card than the parallel version #ed to the player's jersey number.... I think it's a bit of a misconception. There are plenty of players where this is the case, but there's also plenty of players where it's not the case.
People will point to Crosby Cup Golds /87 selling for less than the RCs /99 - but we're talking about a parallel vs a true rookie card, and the print run is all of 12 cards different. If Crosby wore #8, does anyone really believe that the RC /99 would outsell the Gold /8 ???
So yeah.... Ovechkin's parallel is more valuable than his regular RC, but the Crosby that isn't the case.
I would suggest this: If you're getting the parallel version of an ARP, and it's numbered to 25 or less..... I'd expect to pay a premium. If it's numbered to anything over 75, I'd expect to pay more for the real RC.... and anything in between I'd expect the patch quality to mean more than anything else regarding premiums.... but the sales will be similar.
For the record, this is simply my impression based on a few of these cards I've gone after over the years. Only real limited one I've ever owned (from The Cup) is Gagner, which is /99. I could have had the version /91 with a 2 colour patch for less than I paid for the real RC /99 with an all white Patch.