I'm sorry to hear that you lost your old boy.
I've never had a setter but I've had dogs and bitches, mainly mixed breeds (ie, mongrels) and latterly working collies and foxhounds. As a youngster growing up I used to walk as many neighbours' dogs as I was allowed, and trained a good few.
It's a cliche I know, but I have found it to be the case that generally, bitches
are more sensitive to harsh tones. Sometimes to the extent that they can't continue working (or whatever you were doing with them) if they are told off other than gently. Dogs are generally more robust, shaking it off with a, "It's a fair cop!" sort of a grin. There are of course exceptions, but I would lean towards a dog if either you or your OH is inclined to shout at a naughty dog, or to administer the odd short, sharp smack.
I did find it to be quite a big adjustment when I started to have bitches, having always had dogs for many years. I wish I could say that I now never shout at any of my canines, and that dogs and bitches alike respond best to a gentle, "Ah!" to correct - but I would be lying. It is true that I now always start with, "Ah!", and am much better at redirecting unwanted behaviours in pups and youngsters, so that reprimands are needed less - but anyone who has working collies that work sheep, and says they never shout at them, is either lying, dumb, or sainted!