DBM, I sold a very small amount of those sets earlier this year on
ebay (maybe 10 sets?), hopefully most of the buyers actually studied the Canadian and German coins together, rather than cutting them apart just to "fill a hole in the collection" (which I have seen collectors do, right at my table at coin shows when I used to sell paired sets). There is no compositional difference, the difference is the pressure of the strike using preassembled un-annealed German planchets. With practice, the right lighting, and using mint state coins, differentiating those coins with confidence can be done.
95% (or more) of the MS-65 and MS-66 1996 German planchets you see in gold shield PCGS holders, were sent in by either CCF user Ty (Jaime, the twoonie man) or myself. In fact, if you have any doubts with a PCGS slabbed example, a quick check of my files and certification numbers could confirm that.
All bets are off with examples in ICCS, CCCS and NGC holders - the latter of which I have seen "German planchet" attributions on a 1996 specimen/PL strike (the PL strikes in 1996-1997 have the specimen finish)... another buyer beware example.

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