While I haven't worked with either, I have looked into the subject a bit, and I would have to say that the Coote is the better of the two units. My main reasoning behind this is the availability of readymade accessories for all the major operations you are likely to need, such as a small wheel option for finger grooves and inside curves, a tool rest on the flat platen AND on the contact wheel, and a disc adapter for flat grinding slabs and such.
These options may be available or easily made for the kalamazoo, but I haven't seen them.
Not to mention your purchase is supporting an american small business instead of some huge corporation or a chinese slave labor camp.
James
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Those who are willing to trade freedom for security deserve neither, and in the end, seldom retain them!