Windows Vista Regular(?) vs. System Builders

[jkcampbell730]

I am curious what the differencei s between System Builders and Regular in Windows Vista 64-bit:

System Builders:
http://www.newegg.com/Product/Product.aspx?Item=N82E16832116204

Regular(?):
http://www.newegg.com/Product/Product.aspx?Item=N82E16832116488

 

[The_Other_One]

If you read through the "specs' they are basically the same. I think pretty much it's mis-nammed on newegg's behalf. Both state they are "OEM System Builder" versions. The more expensive one appears to have SP1 loaded.