After doing both cruises, which one would you recommend?
PWS:
Pros: crazy smooth water (relative to Seward) more convenient (unless you're going to Seward anyway), two extremely active and close tidewater glaciers, way more glaciers in general, waterfalls, and closer, more distinct landscape.
Cons: not a whole lot of wildlife, faster boat so extremely windy in the bow.
Seward (Kenai Fjord trips):
Pros: tons of wildlife, more varied landscape, slower boat so the bow is often comfortable, ticks off a National Park box.
Cons: Weather is typically quite horrible, and seasickness could pretty much be guaranteed. Only one tidewater glacier, and not quite as active as PWS.