The second one is faster in every CPU tasks,currently only Clevo D900F supports Desktop i7 CPUs,so if the battery life/weight of the laptop isn't important for you,go for it,because it performs a lot better than a QX9300 in every app,here is a good review for comparison: http://www.anandtech.com/mobile/showdoc.aspx?i=3647&p=5
The i7 is the fastest, but I would recommend the first one (the QX9300) out of that bunch for a laptop. The other CPUs in that list are desktop CPUs, and even though they can be made to fit in a laptop if absolutely necessary, they will kill the battery life, run hot, and are in general a poor choice for any mobile computer.
I'd look for a laptop with a mobile i7 if I could though.
Even if they aren't important, I'd tend to lean towards a mobile processor or a desktop. It's pretty rare that someone would have a situation that (IMHO) would require a laptop with a desktop CPU (especially an extreme edition).
Video editting on a laptop? I'd make sure it has an SSD. Laptop drives aren't known for being speedy. Doesn't make a lot of sense to get the 9650/i7 if your going to pair it up with a large but slow 5400RPM drive. Or a smaller capacity 7200RPM drive.
There are lots of faster desktops than that laptop but since you do video converting and processing,that laptop is sufficient since it has the fastest i7 CPU in it.
The desktop that you posted leaves Clevo D900F in dust in gaming,but for your tasks its not a lot faster since you mostly do CPU-limited tasks and an i7 975 can handle it without a problem