Is Costco dell XPS same as from dell.com

I am thinking of buying the new XPS 8930.  Then Costco has www.costco.com/Dell-XPS-Tower---Intel-Core-i7---4GB-NVIDIA-Graphics.product.100380742.html.  If I take the dell.com entry level XPS 8930, upgrade the CPU and memory to the costco spec, it will be $1250.  The only difference is that Dell has 256GB SSD + 1TB HDD, while the costco is 2TB HDD.  But the costco one is $350 cheaper, way offset the additional SSD.  Does anyone know if the costco version is the same XPS 8930 as from dell.com?  Or is it complete different machine at all.  From dell.com, XPS 8930 is the only one that can come with 8th gen i7 cpu.