Media and advertising executives are trusting the union of ComScore and Rentrak will make a practical adversary to appraisals juggernaut Nielsen as the industry thinks about quick changing viewership propensities. “We are cheerful to have no less than two noteworthy players attempting to construct a superior mouse trap given the obstacles we confront with estimation,” said Brian Hughes, senior VP of gathering of people examination at Magna Global, an ad-buying unit of Interpublic Group. The response from media specialists encapsulates the industry’s long for more advanced estimation that can track ads and substance crosswise over straight TV and digital devices…