non-Adobe settings - Powerpoint Convert a file to PDF using PDFMaker  accuracy? minimal Window Size

I need help with improving accuracy of "Acrobat PDFMaker Office COM Add-in" for Powerpoint Convert a file to PDF using PDFMaker.

Under my normal Windows 10 environment, Compare Results can be inaccurate like false reporting changes in Images.

After tweaking my Windows 10, Compare works as expected and false reporting of change in Images disappear.

What I tried works are as follows:

1. reboot computer
2. close irrelevant Apps
3. keep Window Size to bare minimum for following

        Adobe Pro

        PowerPoint 365 Business