I will contact you directly, but I'm posting this answer here on the G2G also, because I know for sure that more people will be interested in comparing their own file with all the details they've put on Wikitree. (It's so hard to manualy synchronize databases.
However, I'm not comparing my wikitree data with myheritage, but with my own offline database program Aldfaer. Although it doesn't matter which tool you use for Power BI.
I now converted both Gedcom's to txt files and loaded them into Power BI. Now I need to create the comparising reports in Power BI, so I would be able to see the differences per individual in both files.
Kind regards from the Netherlands,