Rat, The "quick attach" buckets for the LA723 and the LA853 are the same size and their heaped capacity is 13.1 cu. ft. However, the square and round "rigid" buckets, although are all 72" wide have slightly larger depth height, length, capacity and weight specifications on the LA853. Since the depth, height and length dimensions are larger only by 1"-2" they would definitely look the same side by side but the heaped capacity on the 723 rigid bucket is 10.9 cu. ft. while the heaped capacity on the 823 rigid bucket is 13.1 cubic ft. Soooo If one has the 723 loader and wants the same capacity in a bucket as the 853 (rigid or QA) just get the quick attach on the 723.
I have to stop now, I'm about to confuse myself. /forums/images/graemlins/tongue.gif