Given all the other variables such as software titles, amount of RAM you throw at it, the hard disk speeds the only way to get a solid number is to run it up and down the track.
I know a quad core is better for video editing and multitasking at the same. My question is, though, how much better/faster is it then a Intel Core 2 Duo with the same FSB and multiplier? I spend about a couple hours a day editing and producing videos, but then I also spend probably about two or three times that amount of time doing just basic web surfing and word documents. Is it worth it to switch from my dual core to a quad?