Typhoon or Blizzard is free Parking. Wet N Wild Charges Parking.
Depends on what you are looking for. I think of Wet N Wild as more "party." That is not what I look for...I really don't enjoy being around a bunch of drunk idiots (and I didn't at 21 either...lol.)
I prefer the Disney parks. Wet N Wild is "ugly" and kind of dropped right in the middle of the "tourist city." You don't get the ambiance of being somewhere else. Their are TONS of stairs and they are narrow ugly stairwells for the most part...so you are overlooking traffic the bulk of the day. At the Disney parks - you feel like you are somewhere else. Which is an advanatage to the "vacation" feel.
I am a bigger fan of Blizzard Beach. If I could move Crush N Gusher over to there from Typhoon it would be perfect...lol! Crush N Gusher is a fun water ride - with uphill climbs like a roller coaster - it is cool. I like that at Blizzard you don't get the feeling of "climbing" nonstop stairs. You can do chair lift...or climb stairs to get to top of mountain.
If you want a real wave pool...then Blizzard is out. My issue is I HATE wave pools. I'd rather go to the beach. The textured bottoms of the wave pools means that when your skin rubs against it = the skin comes off and you feel like you've been rubbed by sandpaper. Not fun to me. I prefer the slides.
Typhoon Lagoon has the Shark Reef which is cool - but the water is COLD! I generally skip it. Not worth the wait once you have done it once.
The Disney Parks are mostly families or teen groups. There are young adult crowds but not to the same level at Wet N Wild.