Telephia and comScore Networks today announced the launch of MobileWeb Metrix, a joint service that compares and combines internet usage data from the two firms. The service will provide media companies, advertisers and agencies with a detailed comparison of audiences who view internet content using PCs and mobile phones.

For example, inaugural results show The Weather Channel, Yahoo! Weather and AccuWeather achieved mobile reach that outpaced their PC reach. ESPN also has stronger reach among mobile web users.

By comparison, results show that Google Search and Yahoo! Search have a higher reach among PC web users, compared to mobile users.

"The first results from MobileWeb Metrix highlight the value of evaluating a web property's performance among both the mobile and the PC audiences," says Kanishka Agarwal, VP of new products, Telephia. "This type of analysis will allow mobile media companies to better target their investments in promotion, content and user experience improvements."

Recently, JupiterResearch predicted that advertisers will double spending on messaging and display ads for mobile devices over the next five years.