Does Logos 4 allow to do comparson study in the same Bible.
The Bible Comparison tools doesn't do this, but you probably have some resources that do. You won't get differences highlighted, though. :
You may find others from the parallel resources menu, or by entering type:bible-harmony into your library find box.
Carson,
The Synopsis of the Four Gospels by Kurt Aland seems to be the one that recognizes the passages you are interested in while at the same time giving you the ability to select the KJV, or other bibles you may have in your library.
Carson, welcome to the forum!
In addition to the above suggestions you can also open multiple copies of the same bible and have them each open to a different reference. Just right click on the tab with title in it and select "Open a copy in a new tab" or press Ctrl+Shift+N to duplicate the current pane.