Fossil
There isn’t a terrible lot to say about this set. Three of the four English sheets (holo, rares, uncommons) are known, as is a German commons sheet. Verification with box opening videos shows the English sheet to be the same as the German one. If my hunch regarding collation is correct (see the post on Base Set above), that would indicate the non-English variants of this set used sequential collation just like the English version, which constitutes a change compared to Base Set.
(Looking at The Collation Project, I see English MTG sets in this era - fall 2000 was when Fossil was released in German - sometimes used striped collation, sometimes sequential collation.)
The rarity table for Fossil is given below:
There are no artificial rarity differences, and the choice which cards appear on the sheet more often seems random.