Google (GOOG +0.1%) steps up its challenge to Yelp (YELP +2.3%) by showing an interactive "carousel" of businesses when PC searches are made for local info. The update follows the launch of a carousel for tablet users in December, and the January addition of Zagat listings to the Google Places API. Meanwhile, CLSA has raised its PT for Google to $1,100, even though Q2 data from search marketing firm Performics has been mixed, with Y/Y spending growth falling to 4.5% from 12.4% thanks partly to tough comps. Mobile now makes up 36% of Performics' tracked U.S. paid clicks, but only 13.5% of ad spend, due to lower prices. CLSA is confident Enhanced Campaigns will help narrow the gap.