Greetings! I am sorry to hear that you are facing issues with compare feature. We are aware of the issues and are working to fix them. I will contact you offline to discuss this in detail.
In past couple of months, we have been addressing lot of issues and feedback that we collected from forums. If you want to play with the early build and provide more feedback, please join our pre-release program.
If you are interested please let us know, we will contact you to get registered in our pre-release program.
Adobe Acrobat DC Team
Greetings! I am sorry to hear that you are facing issues with compare feature. For hiding out the formatting changes you may use the 'Hide Options' in Left-Hand Pane of 'Compare Documents' app or 'Compare text only' mode for comparing the documents. Please reach out to us in case, you face any issue. You may also log a Bug Report at: Adobe Acrobat - Feature Request/Bug Report Form
Also, we have significantly improved Compare functionality in our new release of Adobe Acrobat DC. Please update to the latest version to give it a try. The new Compare Files Tool offers a Side-by-Side view which provides a better experience in identifying differences and a modern UI.
Latest version for Adobe Acrobat DC build number: 2015.020.20039 (Continuous).
For more info about the new Compare tool, visit: https://helpx.adobe.com/acrobat/using/compare-documents.html as well.
If you are still on Acrobat X or XI, you can check out our trial version at: https://acrobat.adobe.com/in/en/free-trial-download.html
Adobe Acrobat DC Team.