When we go on our WDW/Universal annual trip, we do it over 2 weeks. Past practice (and future plans) are to only spend 2 days at Universal, and the balance at WDW. The reason is Universal pretty much exhausts us, and it's not from all the rides and activities. It's a gauntlet from the moment we get on the interstate for the park to the front gate.
The work culture is nothing like the Disney culture. Parking is chaotic most times, and getting out of a parking garage at night a nightmare. WDW has parking coming and going down to a fine art.
We've actually been sitting on rides at Universal waiting to go and have had workers standing on both sides of the ride arguing over top of us about how crummy their work schedule was that had been posted the next week like we weren't even there. I can hear that kind of 'stuff' between cashiers standing in line at our local big box store! We even heard two workers laughing about sending people in the wrong direction when asking the way to the Hogwarts section of the park.
At a couple of the restaurants at Universal food is slung at you like a mall cafeteria with no smile behind the service at all. You feel like you're interrupting their day. This is not at ALL locations, mind you....but at enough it leaves a bad impression in your mind. Sometimes all it takes is one event to take away the 'magic'.
When we first went to the 3 broom sticks restaurant several years ago, the staff went out of their way to make the experience as real as they could, complete with British accents and HP world finesse. The last time we went, they just went through the motions of taking our order and putting us at a table. They acted, again, like we had interrupted their discussion of their next day's schedule. Food was great, but once again, the magic just disappeared with the blank stare and pointed finger to the person responsible for seating after food pick up. We even got to see two of the servers get into a heated argument about who was supposed to get a drink for a customer first right in front of us and every patron waiting in line. Not a single manager got involved, as they were standing at the door talking. A complete free for all between servers! Unreal!
Their customer service, on the other hand, is fantastic. They are quick to respond to any problems, and follow up, so they get kudos in my book for that. The front office DEFINITELY wants you to have a good experience. Problem is, and they've said it themselves to me, a lot of the times the folks 'on the production floor' don't read the memo, and that honestly bothers them.
For that reason I'll take WDW over Universal, but getting past the gauntlet, Universal has great rides and keeps your attention throughout, but definitely adult or older child friendly.
Don't get me wrong, this is NOT a slam of Universal. We always enjoy our visits, but when compared to experiences with WDW, they're as different as night and day.
Just my opinion and personal experience here. Others will definitely vary.
Regards! M