Since there are only two cabins in each of those categories and they often have a wait list, I'd have to say I don't think the chances are very good for a complimentary upgrade. If you're willing to pay for the upgrade, I would suggest getting on a wait list now in the hopes that one of them will become available on your cruise.
It would be more realistic to try to find two cabins that have connecting doors, or two cabins that are near each other. In October, we had 6 in our party and I booked two connecting cabins, 6612 and 6614 in Category 6 with a Veranda in each one. We enjoyed them very much and only closed the connecting doors at night.
Some people like to get one cabin with a veranda and one across the hall as an inside cabin. Some people like to get two inside cabins.
hope that helps