Thanks for your inquiry.
I try compare two docs with table. But I have two problem. First I catch exception when try save to html, I find hack - save document to docx before export to html.
While using the latest version of Aspose.Words i.e. 16.6.0, we managed to reproduce this issue on our end. We have logged this issue in our bug tracking system. The ID of this issue is WORDSNET-13985. Your request has also been linked to the appropriate issue and you will be notified as soon as it is resolved. Sorry for the inconvenience.
Second problem, in html I see extra rows.
Can you please create a comparison screenshot highlighting the problematic areas in the final 3.HTML file and attach it here for our reference? Thanks for your cooperation