There are a couple of good reviews and comparisons about climbing vertical ice with vertical points or horizontal points and I'll try to find them later, but in short, you can check out these forums that have discussed crampons extensively.
neice.com
cascadeclimbers.com
mountainproject.com
Although vertical points like Grivel G14s, BD Cyborgs, and Petzl M10s climb steep ice and mixed really well, all around horizontal 12 points like Grivel G12s and BD Sabertooths, climb great as well.
If I'm out just to climb steep ice without a long approach, I'll use my G14s. If I'm going out to climb Gothics NF or Trap Dyke, I'll use G12s or BD Sabertooths. I have not had any experience climbing mixed, but hopefully this winter. . .
Between the Grivel, BD, and Petzl crampons, they all climb pretty well, and it's a matter of personal preference. In my opinion, I would just buy whatever you can find cheapest, but I do really like the Grivel G14s and G12s.