Help creating a link to compare current page version with the latest final version

[Eugene Shvets]

I am trying to create a workflow for my space.
This flow includes 3 stages:

• Draft - a stage for creating/updating page
• In Review - a stage where page author can add approvers for further review
• Published - the final stage

In the current flow, all approvers receive an email with the link to a page. 

I want to add a link to compare the current page version with the latest final version in the email so they can easily review changes.

Current email trigger:

{trigger:pageapprovalassigned|approval=Review}
   {send-email:user=@assignee@|subject=New page ready for Reviewing}
   The page @page@ is waiting for your approval.
   {send-email}
{trigger} 

 Thanks in advance