We were on the 4 day Sovereign in July, and had a regular outside cabin. Another couple we met had a larger Oceanview on th 9th deck (can't remember the name). There is a difference in size but not a huge difference. I'd say the actual cabin area is about 4 feet wider (there was enough room between the beds to put a small table, where the regular oceanviews only had about 2 feet between the beds. The cabin does have a bathtub, though it is quite small. Don't expect to stretch out and have a leisurley bath! The window was also a little bit larger. As long as you aren't paying more than a couple hundred dollars extra, I would say its worth it. Warning...the cabins on the Sovereign are VERY small, but they are adequate for the amount of time you spend in them.