I've been using a pair of Quasars for the last few years and unfortunately they blow for alpine. Any of the tools with the radically curved shafts are going to suck for anything other than vertical ice and mixed climbing.
I got to use the Cobras for the first time last year and found their swing weight to be lighter than I'm used to. If you're used to heavier tools, like the Quasars or Quarks you might find yourself swinging the lightweight tools twice to set them instead of just once.
Anyways, whatever - they all work.