Terrain and conditions determine how the rabbit or hare will run more then anything. i have had big running cotton tails in open country with good scenting conditions, and poor zig zag running hare at times as well.
the average snow shoe hare is harder running and puts the most distance between the dogs and its self. jacks dont seem to care about the gap between them and the dogs. not sure why that is, i can only assume they have the speed to always get away, or the hole to get into if the dogs are closing in on them. snow shoes are hard for dogs to catch/hole up.
In idea conditions with the right pack, you can catch consistently.