I will be in AC 2016!
I plan on displaying "THE CIRCUS"
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Nasti Nat.....
your are almost 100 % correct....a real dramatic color variations are usually SCRAPPY..........
Most other factory cuts are due to environment post printing(chemical, sun fade, ect)....
there are many boston players including Sweeney "NO B" which fall under the "missing magenta" category which are legit....
and there are some other factory cut cards which are legit missing a pass or 2....
so, the answer is....there is a"mix" of 100 % legit variations and environmentally "altered" variations....that's where an expert is of value