I don't know if I qualify as someone knowledgeable, but since no one has responded, I'll give my biased opinion.
The Sport is nice, but I'm a big fan of the Revolution, and I'd recommend it to you based on your concerns. Here's why:
- Sport or Revolution Portability: Yes, the Sport is shorter and lighter. Now the question is does that really give you an advantage in portability. For me, I have to rooftop the boat whether it's 9'7" or 13'5", so the shorter length didn't help me. The weight difference is only 10 pounds, and for me, that didn't make enough difference either. So in my case, both boats were equally portable.
- Manoeuvrability in tighter water. There's no question, that the size difference allows you to have a boat that can turn around in tighter rivers. The one thing that I've found is that for my use, I'm rarely in water that is so tight that I can't turn around the Revolution, but I would be able to turn around the Sport. I go through some tight areas all the time, but there is only a very small window of my use, where I get in to areas that, 1) I'd have to turn around in, and 2) I'd be able to turn around the Sport, but not the Revolution. For my use, most of the time I'd be able to turn both boats around, or neither boat. Adding the Sailing rudder to the Revolution would help the steering response of that boat which might close the gap between the two boats.
-Differences in how the Sport and Revolution move in the water If you're going to go fishing, only in very tight places, and really need a shorter boat, the Sport is good. Although I'm not a fisherman, I'd still vote the Revolution for the following reasons: 1) The Revolution will allow you to get to the spot faster and with less effort 2) You will have more room on deck especially behind the seat, with the Revo, and more room is usually good for fishing. 3) Both are great fun as a Recreation boat, but I'm would think that a Revolution would allow you to go faster, farther, and with more stuff, and that's probably going to mean that you'll enjoy it a little bit more.
-Advantages of the Sport Great "little" boat. It's a bit wider, which might mean that you have a bit more stability, although the Revolution by kayaking terms is incredibly stable. No one that I know would refer to the Revolution as intimidating in it's stability, but some like a bit wider boat, and the Sport has that. It's also cheaper, and that's always a nice thing to have. More money for accessories, or other life priorities.
In Summary, in a head to head competition, I think the Revolution would win every time as the better boat. Now if you don't have a place to store a boat that's over 13 feet long, or if the lightest weight is very important to you, or you feel that the ultimate in manoeuvrability is the most important thing, or price is crucially important, then you may have a case to buy the Sport instead. If you're looking for the most versatile boat between the Sport and Revolution, I think the choice is clear.
But again... I'm biased!
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