I would choose Fisher for one reason, not a fan of the pivot tube thing on Western. Putting all the weight of the plow on the pivot bolt causes the tube to wear quick and really just one more thing to wear out.
Never really understood why some of these wear out.
I ran the old style for 10 years and never had any problems with it, yet I see them worn out on used plows all the time.
Not sure if people over tighten them, leave them too loose, or maybe don't keep their stuff clean.
The updated version is a little beefier also has a grease zerk in it and runs around $170 at Storks.
Even if it wore out every couple of years, I'd still buy the Western over the Fisher because of the benefits that the pivot system provides, and chalk it up to a wear item.
My .02