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As for WOG, I disagree. How exactly do you plan to track who played on WOG and who played on The Shadow of Death? These games have completely different concepts and resulting walkthrough tactics. I would advise you to think very carefully about this so that there are no misunderstandings later
If a save is made for TE, it will be the same in SOD, both regarding magic and heroes. Even in WOG it would be almost the same, but playing on it is forbidden regardless. Previously, you could load a save into another version, use the advantages, and then switch back. Such a cheat method was used and even went unnoticed... But in TE, it's elementary to track!
TE has advantages over SOD, but not vice versa! This means if you're too lazy to download it — that's your own fault!!! That's the whole problem.