The difference being the 3 inch rail on the Beisemeyer vs the 2 inch rail on the Delta. I've played with one at the store and think it's a decent fence, for the money. Biesemeyer is part of the Delta brandwhich as of 2020, still sucks. Like a conveniently located push-button arbor lock for quick, easy blade changes.
This item can be shipped to United States, to Canada, to Biesemeyer Fence Cam Foot. This should help in deciding what Replacements are available based on your saw model and fence size needed. Special Promo Price! Don't wait, this lowest price of the year only lasts for the month of November!!! Buy yours today!!! Get ready for something radically different. The Biesemeyer type might be easier to build jigs for it, but both can be done on either fence type.