Bob, I've used both, concrete wire and "horse fencing". Hands down the concrete wire is easier to use. First, the concrete wire is rigid enough to stand without posts, all you need to do is pin it to the ground in a couple of places with edging pins. Second it is strong enough that deer can't push it down to reach branches (although they can reach in the 6x6" holes if the fencing is too close to the tips).
It does rust, but I find that to be an asset, as rusty metal tends to disappear when you are looking at your orchard, whereas the galvanized stuff sticks out visually.
It is more expensive than the horse fencing (although maybe not if you add in the cost of T posts), but has done a much better job for me. Only possible plus for the horse fencing is the graduated size of the holes vertically may keep adult rabbits out.