Quick heads up. Ali from MyNokiaBlog has shared a video demoing the software and speed differences in Nokia Lumia 920 and Lumia 720. Both are running the Windows Phone 8 operating system but Lumia 720 is on a lil lower side when it comes to hardware. Lumia 720 is powered by 1ghz dual core processor and 512mb RAM whereas Lumia 920 is a high end flagship running on 1.5ghz dual core and 1gb of RAM. Although, this doesn’t make much difference because Windows Phone runs quite smoothly on both phones, but the low RAM on 720 restricts it from running some (very few mind you) apps/games.
Watch the video below.