This may be dependent on the amount of traffic to the site. Both of the sites use very dynamic graphics and color schemes. Organization of the site content is similar. They both have navigation tabs on the top. These navigation tabs are eye catching to the user.
Online help is very convenient and easy to use.
Community forums on each web site play a significant role in helping users research and purchase products and services. Dell community forum is designed to boost confidence of potential computer buyers. Dell direct web site is a store front model. Color schemes are different. Dell direct site is faster to load.