Extended and XL motherboards?

[xtreme 15]

Just a quik question cause i want to buy a new case and wondering on the form factors of the mobo's.
Whats the difference between extended and XL? Are they the same or not?

 

[nforce4max]

Extended atm is for 11 slot boards as well mainly servers. XL well I haven't payed to much attention to that segment.

 

[xtreme 15]

Basically I want to buy a case for my XL motherboard (Msi big Bang Marshall)

There is 3 cases that I'm looking at and not sure if the board would fit.

http://www.newegg.ca/Product/Product.aspx?Item=N82E16811133192

http://www.newegg.ca/Product/Product.aspx?Item=N82E16811139001&Tpk=corsair%20800d

http://www.newegg.ca/Product/Product.aspx?Item=N82E16811163135

http://www.newegg.ca/Product/Product.aspx?Item=N82E16811163067