DL wins in my opinion hands down!
The smaller park size makes navigating so much easier and less exhausting. You also become part of the park since you are almost forced to see almost all the elements of it as you navigate between rides. Such as running into the musicians in New Orleans Square, or the parades since their route goes pretty much throughout the whole park. There is just an essence of specialness in the air. MK seems more like any other "theme park". Doesn't quite make you feel apart of it. Ride wise DL is better in my opinion. Space Mountain is more space like and POTC is FAR better in my opinion as compared to the MK version. Plus, DL has Indy and the Matterhorn which are pretty enjoyable rides.
P.S. My honeymoon trip report probably will be posted sometime tomorrow