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AnonymousWeils are toughest, Standards are a little easier, then there is a big gap to Boston Store and Collins-McCarthy, which are about equal in difficulty. I have both versions of the four corrected cards in Collins-McCarthy, but have never been able to find the corrected versions in Boston Store. Can someone verify they exist? If not, C-M may prove slightly easier than Boston Store since one can presume it was issued and circulated both before and after the corrections.
I do not know if the variations exist in Weil or Standard Biscuit.