Never stayed at DI, but have stayed in most of suite rooms at LA including on the top floor. It is hard to imagine the service being any better than LA's service. If it is then go for it, but the people at LA make you feel as if you are at home, just like they do at SL.
Not to mention throw in the balcony for the room at LA!! VERY fond memories of chicas bent over at the rail for a nice pounding, even in the rainy season

Add in the dry sauna, jacuzzi tub and more than ample space and the DI would have to go a very long way to beat LA.
Don't worry about the walk up the stairs, there are chairs and sofas at each landing area for you to rest.

PLUS the chicas LOVE that room

Enjoy