The first Karma was identical to the V-Pro I think.  The newer Karma is a bit fatter.  I have the black V-Pro from two years before the grey one and it definitely is identical.  I've skied them for three season - they're pretty stiff.  Too stiff if they're just for park, but if they're wide enough for you then there are very few skis that will be as good all round.  They float OK in light powder, alright for riding switch, but really stable at speed if you're a good skier.  You can't relax too much or the ski will kick your ass - they ski best when you're pushing hard and really working them.  I remounted mine +8cm for all park and they ski a hell of a lot nicer switch now, so maybe mount forward a little bit if you're skiing them all round.