Yes, the game was played on two different maps in "scenario" mode, i.e., hot seat. Both are available at the following links:
https://www.maps4heroes.com/forum/opinions.php?map_id=846&game=5
https://www.maps4heroes.com/forum/opinions.php?map_id=876&game=5
The starting settings were chosen as for version 5.5. The difficulty was medium (+/-), with an 8-stack skill set, and it seems that's all.
The functionality of the quest buildings on both maps is the same and in both cases differs from the original Heroes 5. For example, for assembling set artifacts, there is no offer to exchange them for another relic at the Altar of Sacrifice. Moreover, even the building itself looks different, which is why I thought that it was designed that way from the beginning.
Another example: the Thieves' Guild. Instead of its previous functionality, it simply adds 1 Knowledge.
Taverns on the map work similarly: instead of hiring a Hero, they simply add 1 Knowledge.
Another interesting feature was noticed. The size of the AI army grows when it engages in battles. In the 5.5 settings, there is an option to compensate for the AI's losses in battles, but in many cases, after battles with monsters, their armies do not decrease, but grow.

Thank you for your promptness.