Just to let you folks know if you have a Samsung Galaxy S23 Ultra Quadlock Cover, it will fit on a Galaxy S25 Ultra. It does require a slight customization at the bottom most of the three camera lenses, where shaving 1/16th of an inch off of the cover lens opening radius (very little). It will look like new, difficult to see any tweak work.
Nice surprise for me, as I thought I would need to buy a new Quadlock cover when I upgraded my phone yesterday.