Most of the differences have been explained by everyone else, the only thing I'll touch on is that the Adventure feels more "lively" then the Revo out on the water. I find it to be quite enjoyable.
The Revo in comparison is rock solid stable. I call it the barge, and that's not a negative term at all. My wife uses our Revolution, and she likes that the bottom of that boat is always perpendicular to the water below it. It's very predictable, very safe feeling.
So the Adventure, to me, is the sports car of the two. You feel from the seat of your pants what the boat is doing. Get it going fast, crank the rudder in one direction or the other, and it leans like a motorboat into the turn. Kind of fun. Do the same thing with the Revo, and it remains nice and level, which inspires confidence in my wife.
You can't go wrong with either boat. At the end of the day, if you're in average shape, and get the technique down, it's not going to take you any longer to throw an Adventure on the roof of your car, then it is a Revolution. If you're healthy enough to throw a Revo on the roof, then you should be healthy enough to put an Adventure up there. The Revo will be a tiny bit lighter and a bit shorter, so if that matters, keep it in mind.
Both boats are great. It's really personal preference. For me, I always wondered why anyone would want a longer heavier boat then the Revo. After using my Adventure for a year, I totally get it. It's the performance kayak in the line up.
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