Each of these ukes are solid mahogany wood, basic models, with no bindings.
I'll gradually build up the reviews as I live with them and play them.
Starting with prices:
Martin S-O Uke $252.00
Martin Vintage Style O $405.00
Kiwaya KTS-4 $397.00
Koaloha soprano $439.00
First impressions and general appearance:
Left to right: Kiwaya KTS-4, Martin Vintage Style O, Martin S-O
The Kiwaya KTS-4 has a lovely even satin finish (with the pores of the wood filled), the vintage Martin O has an aged patina that can only come with an old instrument. The Martin S-O has a matt finish with open pores, and actually has a kind of "dry" appearance to the wood.
For those that know the finish on the Martin 15 series guitars, then one would expect a similar finish on the S-O uke, but it isn't. It is dry and lacklustre. The other thing that was immediately noticeable was the finish of the top around the bridge area. You can see it in the photographs above and below. Hmmm!
Frankly, not ever so impressive for an instrument with Martin's name on it.
So much for the very first impressions. I'll gradually add detailed descriptions of the build quality, materials and sound as we go along. (Shall I also add in the KoAloha soprano too?)