Not sure if this subject is dead or not. But thought I would offer a little different point of view from somebody that rows a little different boat.
I have rowed Hydes and Clacka's low and high sides in the past. So I am not going to go into that as Waterwolf gave a really good description of both.
What I do row and have rowed for the past 5 years is a Boulder Boat Works drift boat. The boat is made primarily of HDPE, and is welded using the plastic weld technology. It is not a rotomold like the Hog, therefore not nearly as bulky or cumbersome. The gunnels are oak, the casting decks and ribbing is mahogony. She is a high side boat 17 feet in length. I have rowed the Hiwassee, part of the Colorado, the Clinch, Holston, South Holston and Watauga in it. High water on some low water on others. I have taken some nasty hits and put her in places that made me pucker.
The Pro's, the boat is about bomb proof. The plastic make up of the boat is extremely strong. It is giving but not soft by any means. The slick bottom allows me to belly up to and slide over rocks that I see many aluminum and fiberglass boats get stuck on. My version also has full bench storage under the front seat and rowers position. So there is plenty of dry storage. She is a little bigger boat than most on the water which allows more room to move and gear to store. Also the seats that came it are some the most comfortable that I have ever set on. It is easy to clean and doesn't hold water stain. It has classic lines and is very easy on the eyes. Not sure about the Hog Islands, but my boat has never warped.
The Cons, she is heavy. Not tremendously so, but her size and weight make her float a tad deeper. Which makes her not as nimble. Once you get her on top of the water she will hold, but it takes a good pull to do so. I have 8.5 foot oars, I could see myself easily switching over to 9 or 9.5. While she isn't easly pushed by the wind, you have to be true on your line when dealing with fast water. Because once you are in it you are committed. Also the wood work requires more time and maintance seasonly. The varnish will wear off and you find yourself sanding and reapplying every so often. One day (luckily not anytime soon) the chine will need to be worked on, so finding a person that works with HDPE is not quite as easy as finding someone that works with Fiberglass.
All in all I have enjoyed her.
Boulder Boat Works offers varying packages and customizing what you want is not hard.
I don't sell them, I make nothing off of them. Just thought I would provide a link so you could check them out.