There is essentially no difference in regards to warranty services like depot repair or RMA parts. But there are other differences that are notable.
Direct clients have additional warranty service options not available to clients who have purchased systems from retailers like Newegg or Amazon. These services include:
Clients who have purchased retail systems have 1 Yr Standard Parts & Labor Ltd Warranty, 1 Yr Depot Repair, and Lifetime phone support. They are not eligible to add additional warranty service options or to extend their term length.
Note: Systems not purchased from an authorized retailer or reseller, like those through clearing houses or online auctions, no longer carry any warranty at all as warranties are non-transferable from the original owner.