451 ED cabrio does have interior headliner. It does not have tailgate EVSE storage as it is configured for rails and there is no alternate place to "store" cable as with the ED coupe.
451 ED cabrio is noisier (both wind and road) than coupe which might distract from the EV silent running.
On the other hand, you live in a mild climate so the top will be back most of the time adding that "kewl" factor while not using any battery power to cool/heat the interior!
451 ED cabrio may not be as easy to load up that Costco shopping cart as a coupe hatch but no real issues, just a matter of taste.