I have a Graco Quttro Duo that I use at home. Here are my thoughts.
Pros: Smaller fold - I drive a chevy and this was the only double that would fit into my trunk
Very easy fold
Excellent storage basket
Excellent parent/kid storage - cup holders, etc
Nice to manuver
Older kid can climb in by themself
Cons:
VERY heavy - to lift and push. It takes a ton of oomph to get it going
Storage for kid in front not very accessible - under seat
I loved this stroller when DD was in an infant carrier, but now that she is 20 lbs and DS is 31 lbs, it is just getting too heavy to push. Now the DS is 3 and is able to do more on his own, I just got a Joovy Sit & Stand and am enjoying that. But at age 2, he wasn't ready for that. Also sit & stand doesn't have a comforatble seat that DS can relax in.
Whichever double you choose, I'd recommend finding one used on Craigslist or something. That way you're not paying full price and can use it for the time you need it.
For Disney, would 2 umbrella type strollers be an option for you? I still love my
Chicco C5 for it's comfort, height of handles and weight and size. It has no cupholders and small storage basket.
FWIW- There's a dining review by a mom with 2 little ones who took their Quattro Duo. I asked for her review on the stroller at Disney, she said it was a nightmare.
http://www.disboards.com/showthread.php?t=1850296&page=2