Why does my Indigo2 sound bassier/phatter than my Ti2?

[nowtime]

I am a proud recently new owner of a brand new Ti2 Polar. OMG what an instrument! Such a joy.

The first day I had it I did some side-by-side comparison with my Indigo 2 (with the "Indigo" written in script). All in all the Ti2 seemed brighter and more digital, the Indigo seemed warmer (could have been my imagination).

But then I compared same-named patches and the Indigo versions were bassier, and phatter. Definitley richer low-end. (in fact on some patches I couldn't even get to the lower octaves that the Indigo was set at - maybe I just need to transpose those patches down?). But when comparing within the same octave, there was a big difference in sound.

Anyway, what could account for this? Is the Indigo a phatter beast? Is there something different in the Ti patches - maybe a sub-oscillator or the eq?

I have other priorities, but I would love to do more tests, even though I must soon sell the Indigo

Thoughts?