I'm just not seeing a big enough disparity between these two teams to justify such a generous line. Utah has had seven losses in the month of January, but only one of those losses can really be considered a "bad" loss. That was to the Indiana Pacers and it was only by four points. Their other losses were home games to Atlanta and Golden State, and road losses to OKC, Houston, San Antonio, and Cleveland (with Lebron James back).
All in all, these two teams are about equal in the talent department and Utah should play within the number, even given the b2b spot, with a reasonable chance to win outright.