: Am thinking about either of these two boats as my first kit. I'm a relatively
: new paddler (upper level beginner) and would like to build a boat this
: winter. Both of these boat look good on paper and all the reviews I've
: read are positive but I can't find any comparison between the two models.

: I'm 5'10" 220# shoe size 11 and will mostly be kayaking on lakes and
: slower moving large rivers (Ohio River and smaller). I want the boat
: mainly for exploration and play so I'd prefer a boat that has moderate to
: decent speed and good maneuverability (the play aspect). I will be using
: the boat for camping so cargo is also a factor.

: My wood working skills are good (used to build furniture) and I have epoxy
: and glass experience and a controlled environment.

: I'm liking the Merganser because I can build it from plans and have the
: option of a strip built deck (I'd like to build a full strip built boat as
: a second project) and you can't get plans for the Tern (Kit only). I could
: start the Merganser right away but would have to wait for fund for the
: Tern.

: My question is fairly subjective I know but I'm looking to find out what
: would be a better boat for me based on the above criteria. Both boats are
: good looking but if one performs significantly better than the other that
: would weigh heavily on my decision.

: Thanks

I have built/paddled a Merganser 16, 17w and 18 and paddled a Merganser 17 and AT17. None of them really fit the bill of maneuverability and cargo capacity compared to the Arctic Tern. The Merganser 17W is close but the handling/pivot point is kind of funny, weathercocks a bit that isn't easily trimmed by a lean and if you weight the stern it's obvious the speed is lost and the balance is gone. The Merganser 18 has a volume close to a CD Caribou and like the Merganser 17 it's a firm tracking boat and efficient.
Maneuverablity and speed are kind of opposite ends of the spectrum and when attempted other handling attributes like weathercocking or ability to correct for it tend to be worse.

The Merganser 17 and 18 will feel more snug than the AT. The 17W with a skeg would be a worthwhile option. If you make the AT17 I'd suggest making your own recessed coaming as the peaked coaming and optional thigh bracing is kind of antiquated design element. I've made a Osprey 13, Coho and recently a Penguino. On the Penguino I made my own recess and thigh braces instead of using going with the original design.

Honestly the Penguino would make an excellent "play" kayak for your weight and intended use even though the AT17 would fit a slightly higher paddling speed. If you're just beginning your search there's nothing wrong with researching it well.