Not at all.
The IllumiNations Cruises are given on very small (hold upt to 12 people) open-air Pontoon boats (and one on the "Breathless" a reproduction of a mid-20th century speedboat.)
The Friendships are very large enclosed vessels. There are the two on the WS Lagoon and several other similar boats that cruise taking guests back and forth between Epcot and MGM with stops at the "Epcot Resorts" along the way.