We just got back from our first stay at the DLH and we have stayed at the GCH 2 times before. Even though I really liked the DLH, I prefer the GCH. Here are the reasons why...
#1. The open lobby at the Grand really is amazing. For me it is a WOW factor that the DLH doesn't have. And, with the lobby at the GCH, there are comfy chairs to sit in for a break, and the beautiful fireplace is my favorite.
#2. The location really can't be beat. I didn't think the DLH was going to be that far, but after a very long day and tired feet, it felt like 1,000 miles. And, if you stay at the DLH, don't count the monorail as transportation. Every time we wanted to ride it, it wasn't working. For our whole trip we were only able to use it once.
#3. The rooms at the GCH are said to be small and dark compared to the DLH. We didn't find that at all. Maybe we had a small room at the DLH? We've seen pictures with rooms with 2 beds and a sofa at DLH, but ours had a king and just a chair - so not huge by any means. I would say the size was the same.
#4. The pool is also said to be better the the DLH. We liked them equally. The DLH seems a lot busier than the GCH hotel - we couldn't find open lounge chairs at the DLH, but easily found them at the GCH. The kid area was better at the DLH, but was broken while we were there. That would have been a total bummer if we had our kids with us, but since it was just DH and me, it didn't make a difference. Well, it made the other pools totally full of little kids, so I guess it did have a little difference for us.
#5. I didn't like the 3 different towers at the DLH. At the Grand, everything is in one building. Yes, it can be a walk depending on where your room is, but at least if you want to go to the gift shop and buy something (like band aides) you don't have to go to an entirely different building.
All that being said, I did LOVE the headboards at the DLH. They are super neat and we turned them on every night we were there. But, when you look at the small price difference between the 2, I would always pick the GCH over the DLH. I didn't know that until I stayed at the DLH, so I am glad to now know which one I prefer. We have rented a DVC villa at the Grand for our upcoming September trip and I am sooo excited about it.
Good luck on your decision. You really can't go wrong with either hotel. They really are both amazing.