In reply to andyinglis:
The new G20 Plus (and other G2x Plus models) adds to option of replacable front points (like the new Dart).
So a bit more longlivery on them as with the old fixed models (G2x, or Dart/Dartwin).
Naturally it depends on the ice you climb. Where I mostly climb, the ice tends to be featured and not all that thick. So a monopoint works like a champ (you place it like a rock shoe or crampon on mixed). If you have more ice available and casually just stomp it in, then dual points give a more stable platform.
The media I climb mostly also means that I do like really aggressive secondary points (for stability), like the ones on Grivels Rambo 4s or Racing fruitboot crampons. IMHO Petzl Lynx, Grive G14 and also BD Cyborg don't have aggressive enough points for my liking. And I would have preferred longer front penetration on the original Darts as well (started to get reasonable when the fixed front point was getting worn down... unfortunately then also the secondary points started get shorter). Currently mostly use BD Stingers, but even they don't work out as well as my Grivel Racing -bolt ons.
That being still said, I have a pair of really well worn G14s that I occationally use for drytooling (will get binned soon), a tad better old Darts (that I still use for drytooling and mixed) and fresh fronts of Dartwins... That I might take out on a spin if I ever get to travel somewhere with a lot of ice... But as said my daily driver is Stinger and sometimes I might take out the fruit boots as well.