Which is better depends on the root word, so there is no way to say one is better than the other without seeing the name (so I could not vote).
As far as pure resale value today, .info is better. It has been around longer and has nearly 3 times more total registrations than .us (thus there are fewer good names left in .info). .US sales will pick up as good names continue to disappear (I am helping make that happen) and people hear about and become used to the extension.
Also you are comparing apples and oranges. .info is a global TLD, suitable for use worldwide. .US is the American country code TLD meant only for entities based or with a significant presence in the U.S. I would think that due to its worldwide appeal that overall .info will probably stay above .us in value - however the U.S. is a huge market, so many well chosen .US names could be worth more than their .info counterparts.
I personally like the future prospects of both and register names based on what is best with the extension. If you are an American, .US will have a broader range of uses than .info. If you have an informational site, you won't find an extension that makes more sense than .info.