In reply to mtom91:
The Lynx have more points on, so will feel more secure on steep ground, this will also account for some of the extra weight.
The Darts are much lighter and also have rearward facing points that are useful for hooking with on steep ground, ice or mixed.
If you are looking for a crampon to climb steep ice and mixed ground then the Darts would be a better choice but if you are looking for a more general purpose crampon then the Lynx would be a better bet. The chances of you not getting up a climb for buying the Lynx over the Darts is vanishingly small unless you are a top end climber and in that case you would probably know the answer to your own question (this isn't meant to be an insult/dig).
The Darts are less suitable for general mountaineering than the Lynx although I'm sure someone will come along at some point telling you that if Ueli Steck can climb X, Y & Z in them then they will be fine.
Just to add some context, I have a pair of each and have used both for stuff in Scotland and the Alps, if I had to pick one pair then it would be the Lynx as I know that 98% of the time I will get up the route regardless of what I have on my feet but the Lynx will make it easier to get onto and off of the route. Hopefully that makes sense!