I don't think that is possible as you'll need to pass them down a DataView widget which can only hold 1 object.
Placing two DataViews for it is also not possible as it doesn't know which object needs to be passed in which DataView.
What if you add a button that triggers a microflow with input parameters a List of the object you are trying to verify. It then checks if there are exactly two objects selected and you pass those two objects into another page where you have a Gallery in which there are two columns to compare both objects.
Let me know if you have questions!
Okay Thank you @Jurre Tanja