In reply to RobbieNClimb:
> Because they have more flexibility rather than the stiffer sling used on sport draws.
That has absolutely nothing to do with whether it's a wire gate or a solid gate. You can put any type of krab on any type of sling.
If you have keylock style gates normal on most solid gate krabs these days it makes cleaning your QDs while lower off much easier. Most (but not all wire gate krabs still have hook noses and they can catch on bolts as you try to take them out (this isn't normally a problem on vertical or less than vertical routes though). They are also less likely to catch open on older hangers:
http://blackdiamondequipment.com/en/qc-lab-weakness-of-nosehooked-carabiner...
Keylock (or "clean nose" wire gates) are probably also safer on the rope end. People do sometimes grab krabs when they fall, and without the hook nose you are less likely to de-glove a finger (strip all your skin off) or end up with a krab through your hand.
Wiregates freeze up less easily if you are winter climbing and suffer from gate flutter less. They normally weigh less too.
Hence, you sort of need to decide what is most important to you - many of us climbed with solid gate krabs in winter for a longtime with no great issues, and other do all their sport climbing with wiregates again with no issues, so it's all "marginal gains" in either direction.
My favourite krabs for sport and summer trad cragging are DMM Shadows, but I also have a set of wire gates for winter/ice and trad climbing if I'm trying to save a few grams for the walk-in!
http://lightfromthenorth.blogspot.co.uk/2013/10/dmm-shadow-dmm-alpha-and-dm...
Post edited at 14:24