I got to play with the bucket for a few minutes and so far its working great! Much, much faster. No sticking clay either! Id say its at least 2x as fast, maybe 3x because the end result is so much better due to the wider bucket. One of the issues with the small bucket is keeping grade, with the wide one, it keeps grade much easier.
I think this will be my go to bucket Ill keep the small one for trenching and when the ground is really hard. The BX has no issues handling a heaped 24 bucket of wet clay over its full range of motion. Would it handle a 32? Im not sure yet.