Microsoft
Hi Deleted,
No problem at all! I'm happy to help. You'll be happy to know we're currently working on updating all the different baselines, Edge and Windows included.
Regarding for request for the comparison feature, this already exists today although in a different way! 
See the documentation http://Learn%20about Windows security baselines you can deploy with Microsoft Intune | Microsoft Learnand scroll down to 'Compare baseline versions.' See an excerpt from that URL below:
"To understand what's changed between versions, select the checkboxes for two different versions, and then select Compare baselines. You're then prompted to download a CSV file that details those differences.
The download identifies each setting in the two baseline versions, and notes if this setting has changed (notEqual) or has remained the same (equal). Details also include the default value for the setting by version, and if the setting was added to the more recent version, or removed from the more recent version."
Regarding your proposed option of creating a duplicate of the old baseline policy and upgrading it to a newer one, we also have documentation that guides on that exact scenario. See an excerpt from https://learn.microsoft.com/en-us/mem/intune/protect/security-baselines-configure#change-the-baseline-version-for-a-profile article below:
"We recommend you https://learn.microsoft.com/en-us/mem/intune/protect/security-baselines-configure#test-the-conversion-and-updated-baseline update on a copy of your existing profiles before you update your live profiles. Before you update a baseline profile to a new version, create a copy of it so you can test the new version of your profile on a group of devices. See https://learn.microsoft.com/en-us/mem/intune/protect/security-baselines-configure#duplicate-a-security-baseline later in this article."
Let me know if you have any questions - hope this was helpful!