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Have a list of the game versions (DS1, LoA, DS2, BW) in each tutorial's preface and next to each have an "applicability" comment. For example:

DS1: This tutorial directly applies.
LoA: This tutorial applies, but some minor changes to the process are necessary.
DS2: This tutorial has applicable parts / concepts, but significant process changes are necessary.
BW: This tutorial is not applicable at all.

If you have a page with a tutorial specific to the version, a link included with the applicability comments would make sense. With minor differences, you could even describe / outline them directly in an appendix / sub-section of the tutorial, linked from the applicability comments...