Anyone heard/compared these carts?

These are not exactly comparable cartridges... and I don't know if you're looking for something specific?
I would find the Allaerts the most musically precise (tonal accuracy, relative dynamics, good extension maybe a tad on the light side).
To coin a phrase (or two): The Koetsu has the unique ability to pick up what it can give you beautifully and disregards the rest. Hence, you don't bother about that rest.

I haven't heard the Sumiko in familiar surroundings.
Cheers

Hi Gregm
Perhaps I should re-phase my question. I currently have the Dynavector Te Kaitora and would like something "different", an alternative view of the music. An "involving" cart, if you like.

I find the DV TK to be very dynamic and able to throw a wide soundstage. Tonally its smooth and able to produce a liquid midrange, not over bloated. Mmm...seems like you've answered my question.

Have you heard both of the Koetsu's? How are they different?
Thanks

Urushi had more detail -- extension if you will. Rosewood sig was more "romantic" (possibly attributable to more pronounced mids?)
Unfortunately I don't know your Dynavector to compare. Cheers