I demoed the mantra last week in 178, conditions were about 2-4" of fresh over an icey layer, I just thought those skiis rocked. I could handle them, they turned when I wanted them to turn, short or longer gs type turns, on edge there was never any doubt where they would go, they were solid and damp, they hugged any of the terrain smoothly, and they felt good, solid and fast when I just let them run flat heading down to the chair.
It seemed when I was on the 183 gots, they took a lot more effort to get them to turn and to control. I know this is different than the conventional wisdom, but I seemed to have a hell of a time on them. And running on the hardpan to the chairs seemed like a precarious balancing act at best.
As I mentioned, even though I was on them twice, maybe for whatever reason I need to try again?