Yes the Phazer has two 5 inch skis, and the SV has one 12 inch ski. So that really makes to difference.A phazer has two skis and is a legitimate snowmobile. This is a dirtbike with a track kit, it is not a snowmobile, it should not be thought of as a snowmobile. And with being able to lean one over in a corner, it will damage a trail, and tear it up.
BTW if you dont lean while driving a Phazer you will be ejected quickly.
Dont be so close minded to new products and over protective of the trails. I can see the SV, which will be classified has a snowmobile, being attractive to new riders and will bring new members to trail clubs. We need more contributing members.