In addition to the above, I have used both the Wild Country and BD wiregates.
The Black Diamond ones come out on top, being far easier to clip, with a much bigger gate opening than the Wild Wires.
I recently struggled to clip one of the latter types on a winter route - admittedly wearing very bulky gloves. After the fourth failed atempt, I decided to remove one glove and then had enough space to get the rope in! Phew!
Wild Wires also have a very sharp edge to the wire recess on the nose of the krab, which is more susceptible to catching on tape.
Generally, I do prefer wire gates.
Hope this is of some use.