Yes I understand your reaction, I bought 2 of them. I think the Big Bang is similar enough to the WC but has slightly more length and backend, but not a huge difference, from what I understand.
When I polished mine for less oil, it still didn't do more than get more length and still arc at the backend. It's just an arc-y control ball for heavier oils.
FWIW, After the fact, the Yeah Baby! lets me get pretty deep. I tried 4th arrow, but not 5th arrow. The older YB plays strictly 2nd fiddle these days.
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"None are so blind as those who will not see."