Originally Posted by Paul Motter
The Statendam is HALs oldest ship, and one of its smallest. Expect it to be fairly quiet, especially at night.
The Westerdam is one of the Vista-class ships which has much more onboard in terms of activities. I am sure you will find it more lively and fun.
If you like small & quiet ships then the Statendam will appeal to you. Both have movie theaters, but the Statendams is nicer and less crowded.
The Westerdam will have the Explorer's cafe, Chef's dinner and other upgraded amenities.
All HAL ships have Explorer's Lounge as well as Exploration Cafe.
The Exploration Cafe is a coffee bar/ library / computer center.
Explorer's Lounge is a comfortable lounge where drinks are served though there is no bar, per se. Every evening after dinner, a trio plays classical music. Lovely.
Prinsendam is actually HAL's oldest ship though they did not build her and she has not been in the fleet as long as Statendam. Royal Viking build her as Royal Viking Sun. She then became Seabourn Sun and ultimately HAL's Prinsendam.