I didn't include `busybox` in my initial table, so it isn't on the blog post but the repo has the data...but I am 99% sure busybox does not have locale support, so I think GNU ls without locale support would probably be closer to busybox.
Locales also bring in a lot more complicated sorting - so that could be a factor also.
Locales also bring in a lot more complicated sorting - so that could be a factor also.