Can someone tell me the differences between this two Thermaltake cases?

[Deus Aquila]

I really liked the design of the Thermaltake Urban 21 case (70 dlls):

http://www.newegg.com/Product/Product.aspx?Item=N82E16811133224

But Newegg also sells this one which seems to be the same model (the picture is wrong tho, some guy said in the comments thats the S31 picture:

http://www.newegg.com/Product/Product.aspx?Item=N82E16811133233

Other than the wrong picture, the specifications seems to be the same but since they have different prices that cant be, anyone have any experience on this products?

I want to use it for my GTX 760 card and Extreme 3 Z87 mobo

 

[whitecat]

see this
http://www.newegg.com/Product/Product.aspx?Item=N82E16811129042

or
http://www.newegg.com/Product/Product.aspx?Item=N82E16811139011

 

[Dark Lord of Tech]

http://www.thermaltake.com/content.aspx?id=4702

Here they describe both ^

 

[Deus Aquila]

http://www.thermaltake.com/content.aspx?id=4702

Here they describe both ^

Thats actually the T21 model, which looks a lot alike, but my question its about the Urban S21 and the Urban 21 BOM (No "S"), but cant find any info about it.