This is a guess, but I think the keybed isn't as high a quality as the 61-note TI. - Ie, i think the 61-note is semi-weighted, while the polar's is "synth-action", or similar.
I can't understand why the Polar is the same price as the 61-noter.
Sure, the white LEDs are expensive, but so were the blue LEDs of the Indigos, and the Indigos also used aluminium cheeks which are probably equally expensive to anything the Polar uses.
Even so, the Indigo2 used to retail for ?1169.99 (RRP), and the ViruskC around ?1449.99 (RRP).
Now the Polar and TI are both ?1499.99.
Surely the walnut strip doesn't cost upwards of ?300 GBP ($577USD)?
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PS > And another thing! Will the Ti|3 have user customisable/importable wavetables?
A ribbon-controller or XY-Pad might be nice, too, please! Thanks!