Asus or Lenovo for video editing?

Video editing doesn't use the video card as much as the name might imply Yes some compositing and special effects certainly do IIRC, but basic editing would probably not touch it at all. So in this regards I would look at the software you are planning on using and just make sure they both match the requirements.

What will make the larger difference for you will be RAM and disk access. In almost all cases I would say you are better off using an external drive via FW800 or eSATA(In some cases FW400 may be acceptable for a single drive) than depending on the internal. So in that regards I am not even certain I would put much stock on the internal drive size either.

Because of this, I would concentrate on CPU and RAM, as well as overall quality. I have a perosnal preference for a QUIET computer, which not all laptops fit this bill. Look up the reviews on both computers and see which one seems to have the better overall quality. The ones that run quieter probably have a better designed cooling system as well(So long as you don't hear of problems in overheating). Make sure you have plenty of RAM and a good strong CPU.

Personal preference here, but if you can, try to ensure there is a Ti Firewire chipset, though this is more important for audio than video IIRC.

So on to the two laptops in question here. In general based only off the specs you have posted, the Asus seems the better bet. I would still look for reviews on quality though as I suspect the overall quality of the Lenovo might very well beat out the Asus. I have personally not been to impressed with the quality of their low end laptops anyways. So long as you don't hear of a significant difference in quality(Which I can't answer for you) the Asus seems like the better buy slightly.

Seablade