2 factors I would consider:
1- Living expenses in Qatar is quite a bit more expensive than the US, especially in Doha in desirable locations. 2- Most, if not all, workers in Qatar are there because they earn more $ than back home, often much more.

so in my opinion, if you are able to find work for the same $ offered in Qatar (incl. housing cost which is steep in Qatar), then I would think US is a better deal.