Yes, there is. SA/SB/SC are Deluxe Verandah Suites and receive all the amenities, like use of the Neptune Lounge, free laundry service, priority boarding, etc. etc. The size of these Suites is 510sq ft. including verandah.
The SS,SY,SZ are Superior Verandah Suites are a bit smaller (bathrooms are the same size in both the Deluxe and Superior) and do not receive the above amenities. The size of these suites is 389 sq. ft. including verandah.
Unless you want to spend the extra money we feel that the Superior Verandah Suites are just as nice as the Deluxe. We don't feel that we need the free laundry and the use of the Neptune, so spend the extra money we would have paid on a Deluxe on Shore Excursions and other things.
It's really up to you which cabin you choose.
To see a picture of both Suites, check out HAL's web site, www.hollandamerica.com
- click on Elegant Ships, Noordam and then "Explore Staterooms".
You will love the Noordam - we did.