Borderlands or Fallout 3 Reg.?

So I got Fallout 3 Regular Edition last week unopened from Toys R Us last week. Was wondering if I should keep Fallout 3 Regular Edition or trade it in for Borderlands? They currently don't have the GOTY Edition so I can't trade it in for that.

In the future, please use theGGD Game Recommendations Thread.Thanks.