I've owned a carbon Millenium, carbon Mako 6 and now a carbon Elite.
Elite slightly tippier than the Mako 6
Millenium def, tippier than the Elite.
For me, it was less about tippiness, and all about placing the stroke,
In the Millenium, I did not feel unstable, but in difficult conditions, I could not always 'plant' a stroke with as much gusto as i wanted, yet I rarely fell out of the ski.
So it (the Millenium)compomised my forward stroke, whereas with the Elite I can 'plant' it much better.
But the Millemnium remains one hell of a boat, slippery as all heck!