Moderator-80
They both look like very nice machines.
They have the same chassis, operating system, hard drive speed and CPU.
Here are differences I noticed:
1) The graphics card. Probably a non-issue for you, since this would be beneficial primarily for gaming and (IIRC) some CAD apps.
3) Hard drive. 1TB capacity vs. 1.5 TB.
4) Optical drive. The cheaper machine actually specifies dual layer, while the more expensive one does not.
My experiences with Newegg have been good.