From first hand experience Setters are harder to train. They are high energy and need to run. They are fast. They are also super smart, which can get them into trouble. One I had could open any door knob, any type of handle. The only way to keep him in the house was to lock the deadbolt, or the cheap old little hook latches at the top of any door without a deadbolt. He could escape any kennel. We installed an invisible fence for him specifically and he would lay at the exact spot in the yard that the alarm went off until the battery died and then run out of the yard without being shocked. (SMART) He eventually became willing to take off and run through the invisible fence, and run back in the yard when he wanted to come back. I unplugged the invisible fence and never installed a new one. This has been a solid 25 years ago. This dog and I went to obedience class with a very successful Pro trainer in a group setting. When it was our time, final night of class, for a sit stay I unhooked his leash... said sit... turned to walk away and we (the entire class) caught him 20 minutes later. He's the only dog I've ever had to repeat basic obedience with. All of that being said I loved him dearly. My children loved him. He lived to be 16 and from age 8 on was the perfect dog. He always needed to be underfoot. We live on a farm and he always had plenty of room to run. He never swam, not a day, couldn't be convinced to go further in then his toes. He was super cuddly and loved his family.
I remember going to pick up my setter and thinking the people had a prison fence around their house. I just thought it was odd. I later realized it was probably for their sanity if they bred this line of setters.
Goldens are easier to train in my experience. I also believe goldens are mouthier as puppies. Goldens are just as smart, but less likely to use it to cause mischief. In my experience goldens have more health issues, but that really depends on each dog. I've never had a golden that didn't swim. I've never had a golden fail obedience class. I've had some much better and easier to teach then others, but never had one fail. I've also never looked into another type of dogs eyes and thought they saw my soul. Cruz looks at me and I know he knows my deepest thoughts. Cruz is my conformation, but versatile love bug.
I have never titled an Irish Setter in an event. I have a senior hunt titled golden with a CGC, and a dock senior title that has health issues. I have a Junior Hunt titled golden that needs one more leg for his Senior Hunt title. He has a Rally Novice title and one leg toward his intermediate. He has his WC, CGC, CCA, something else I can't remember. He has a triathlon award. He has placed in conformation events, but not won. He'd be way further in Rally, but I decided if I want his versatility title I need to get his CD in obedience. I have a 10 month old heavily field bred golden that may be running Junior Hunt soon, or we may just go straight to Senior Hunt. These are just the goldens I currently have and the oldest is 4. I'm not saying any of this to brag, but to show you the level of training and dedication I give to my dogs. Now take that and remember I failed a basic obedience class with a Setter. (basic obedience)
I would definitely own an Irish Setter again. I love them! I'm known to love a challenge. I also really love well bred golden retriever and can't imagine a day without one.
If you have three young kids please know what you are signing up for. You will have 4-6 months of bite marks on your hands and arms. Your socks will have holes, and you ankles will get bit. Your kids toys will get destroyed. Your rugs may get nibbled on and you will spend more time outside in the cold then you want to. It will all be worth it, and it may not be as bad as I've said above, but be prepared for it. We get way too many threads on here from people that think their beautiful puppy is being aggressive. It's not, it's just being a mouthy little fluff ball with no boundaries yet.