HTC HD2 vs hTC HD7 (Which one is better in web browsing).?

Guys my main concerns are Web Browsing/Youtube Client and MarketPlace apps.I dont care about the Amoled or whether a simple LCD screen.My question is which one is better in terms of Web Browsing.I need a snappy phone i even dont need a little bit lag when it comes to web browsing so that means no checkerboards or lag.Its my strict primary concern.So which is better.the hTC HD2 or HD7.? By the way I like hTC Sense better than the WinPhone7 basic interface.Is it true that HD7 cant multitask.I mean i use MSN,Web browsing and listen to songs at the same time i know that HD2 can do these with ease at a same time but i have also heard that HD7 cant multitask.So which one to choose.I need a detailed reply.