Wow, that's an interesting question. I wonder if you're considering staying at one or the other and that begs the question of which parks are you planning on going to? I can't imagine staying at a Disney Deluxe and then not going to the WDW parks and taking advantage of EE and EMH and the transportation services.
Then again, I can't imagine staying at a Universal Resort and then not going to IOA and US.
I think the service at RPH or any of the Universal Resorts is just as good as Disney's. I think you might find a few more amenities at Disney Deluxes but when it comes to being treated right, Universal has no choice but to equal or out perform Disney's standard.
One thing I don't see discussed here is the Express vs FastPass systems. With Express, your keycard to your Universal Resort gets you into a much shorter line for VIRTUALLY EVERY RIDE at the two Universal parks. During our crowded summer visit, that meant almost instant access to rides with 1 1/2+ hour waits. Amazing.
To really show the monetary savings, a family of two adults and two kids would pay, let's say, $189 for a night's stay at the RPH. They have tickets for the parks for two days. But they can now use Express whenever they want. If they had to pay for Express (which you can do at the guest services near the entrance and I believe it's $20-$25, let's stick with just $20) that would be 4 X 20 = $80 for one day, double that to $160 for a second day and suddenly that $189 room charge is looking alot better, gee, about $29 for the room!
Because your keycards get you Express for the day you check in and the day you check out!