How do you generally search for these Maps? For example, WinOLS identifies EDC16U34 and EDC16C39 differently in terms of their physical appearance and the number of variants. What’s the principle behind searching for them? Is there a specific way to identify the correct hardware/ECU version

Flash data has several info coded, sometimes boot info, ecu brand, ecu hardware/software, maps definition... example you can search with hex editor some text like 0281 or bosch or 1037 etc.