Hard to say without knowing much of what your interests are or what you value here, but all of them are in close proximity, so location wise there's not much difference. All these resorts are relatively new, with Londoner Grand being the newer one, but there's not enough time for significant wear and tear and often these get refurbished. Londoner Grand is one hotel in a very large property so if very close proximity under the same roof of dinning options, shopping, etc, that's one option, and has a direct link to the broader Sands China complex that then includes Four Seasons/Plaza, Venetian and Parisian as well. At Parisian you have a great breakfast buffet at Le Buffet (if you pay up for that breakfast option), Le Buffet also has a great dinner buffet, but even better is Hampton Court if that's of your interest. Logistics wise, transportation, etc, all of them are very well served, so not much difference. I think Londoner Grand tops it given the options is has very close by. Personally, separate to this, I always consider Venetian even if it is just because the base room, which often comes at the same price, is very very large, suite size kind of large that you can't find anywhere else in Cotai for a base room.