The nCode felt muddled, not crsip. The kfactor could not be played without a damp, a little too lively for me and rather stiff. The blx90 was something of a tank, like the k90 but had the soft touch of the ncode90, with a much more clean feel to it.
The PS90 has a little from all three. The easiness in swing of the ncode. The solidity of the k90 and the dampened (just a touch) feel of the blx90.