One thing I did notice with those diagrams is that it lists the overall length of a concert at 22 7/8 compared to 22 for a super soprano. That doesn't sound quite right to me, or at least based on the concerts I currently own. My KoAloha measures 23.5 and my Bonanza measures 24. Since I'm looking for a slightly smaller uke to fit better inside my sea kayak, size definitely matters.
So far, my contenders are ......
Islander - slighter longer regular soprano with a 1.5 nut. Under $200, satin finish.
Kala - two choices in laminate long neck, but gloss neck to deal with. Under $200.
Leolani - long neck, laminate, 1.5 nut, under $200, available at Uke Republic, semi-gloss finish, a little lacking in fret markers, don't know this brand?
Kumu - long neck, laminate, 1.5 nut, under $200, satin finish, looks gorgeous, listed on Uke Republic but not currently available, don't know this brand?
Then there's the Flea. Since the intended purpose of this uke is for use while camping, kayaking, rafting, many of you have suggested it. Size wise, either the soprano or even the concert would be more compact than my current outdoor uke, which is the Bonanza. The soprano Flea scale is 14 inches, and the overall length is 20.5 inches. The concert Flea scale is 15.5 inches, and the length is 22.25 inches. In comparison, the Kala longneck is 22.5. So it appears that a concert Flea would be a contender.
I'm still leary of ukes that are made of plastic, since I really didn't care for the Kala Waterman at all. The Fleas & Flukes seem to get high praise from many UU members, and I don't think HMS or Uke Republic would sell them if they were duds. If I got one, I'd definitely get the wood fretboard and the upgraded UPT tuners. They are much more expensive, but I'm not in a big hurry to buy anything until I find the perfect fit. I won't start paddling until spring.