Indeed. I also get good star breaks (at longer ranges) with the Mullers and as for cleaning, well...mine get clean in hot soapy water . . .
You need to test them at the ranges they were intended for, which is why the U3 was best at 40 yards, because it is designed to be optimum at 45 yards.
My main test at the time, was finding that I could stretch the lead out on Station 4 High and still get consistent kills (take the front off, perhaps a bit chippy), where I would certainly miss much more often, with other "hot core" chokes. Not saying a hot core is bad, but it is not what I want. I want the extra few kills when my judgement is off!
So I like the better populated outer fringe.