Rossignol Zenith Z11 Mutix (2008)

Are there any differences between this ski and Rossi's R 11?

I got a pair pro form and at first was disappointed because they were heavy and being a Volkl Skier I was used to a snappy torsion box feel. It had been years since I skied on a damp Rossi. 
 
But these skis really shine when you put the soft arms on them and it's a powder day or a crud day. Their width makes them just fine even deep Utah powder and their radius means they can ALSO carve great. 
 
I was able to do things the people with Fattys could not - meaning I could ski the deep stuff just like them, but I could carve on the on-piste where their big waisted skis just couldn't. 
 
They are heavy - but it seems that this heft helps in crud and difficult choppy snow. I was waiting at the bottom for my buds at Snow Basin after a top to bottom gladed run which had been sun-crusted. One was on fat telemark skis and the other on a pair of B2s. I even switched skis with my B2 friend and they felt dead compared to these Z11s. 
 
They would NOT be as edge-to-edge quick as the R11, nor my older Volkl 5-stars. They are too fat for that. And they don't have that torsion box like the Volkls. 
 
After 27 days on these skis I can say I do like them a lot. No longer am I envious of people with fat skis. As far as I'm concerned these have made them pretty much obsolete. They are a great compromise for the person skiing lift-served terrain, and that's 90% of us. 
 
I've skied since 1966, so I can certainly say I've seen a lot of skis over the years!