The standard Ford 9" housing is a beefier cousin of it's OEM counterpart. They are made from new heavy duty 9" banjos that are reinforced in critical stress-point areas and thickened up considerably compared to an OEM Ford 9" rear housing.
The Moser M9 housing is made to not only withstand the demands of high horsepower applications, but also finish off the back half of any show car with style. They are made from 1/8" thick CNC laser cut steel, which is fabricated from one triangulated piece of metal. Combine that with a 3/8" thick face plate and standard internal gussets and bulk heads and the M9 is ready to take on the toughest racing conditions.
Both housing feature 3.00" o.d. x .250" wall seamless steel axle tubes, heavy duty mounting bracketry, new forged housing ends and new bushings where applicable (cars with rear upper control arm bushings in the housing).
Bottom line, either style housing will hold up to anything you throw at it, it's just a matter of what look you want!