I skied with a guy last weekend on the volkl mogul skis. This guy ripped up the entire mountain. I skied with him in 1.5ft of powder and he ripped that too. He had the exact same look in bumps and powder: feet together, turning like crazy. It was fun skiing behind him and trying to match his quick turns.
I like the Karma as an all mountain ski that is good in the bumps. Never skied it but I seen it in action and it's quite a ski. It skids nicely when you want it to, if that is something you like. That seems to make it good in real tight spots and in the bumps.