Generally the Hampton is much more affordable than the Doubletree. However, you should always do your research because you never know what you'll find.

For instance I'm in Houston tomorrow night for $98 at the Doubletree Guest Suites. This is a great property that I would consider to be just about 4 stars. Right next to the Galleria in the nicest part of town.

The Embassy Suites was $125 and the Hampton was was almost that much.

It's great to get that cheap rate with a guaranteed suite, full breakfast, room service, etc. at a full service hotel.