Screen resolution on Nexus 4 and Nexus 7
How the webpage is displayed depends on your choice of brower and your settings. Chrome on my devices by default displays webpages by width in desktop mode, so I see the same content horizontally on my phone and Nexus 7. But I'd say the web browsing experience on Nexus 7 is much better than on a phone due to the large screen, you can definitely see more on the Nexus 7 (vertically).

Source: I have an original Note (larger screen than Nexus 4) and Nexus 7.