I have owned both. The HK was nice, but sold the HK after a couple of thousand rounds. I never had any trouble with it, but the 220 just grew on me, (ergonomics, trigger after break in) and I didn't need both.
My 220 is now almost 10 years old. I have NO IDEA how many rounds it has on it...... if I HAD to guess, I would just say pushing 10,000. I have loaned it to students, a couple of good friends, and few fellow competitors. It goes with me many places where I will have to leave it in a backpack, or the truck/jeep, or a gun locker, and not worry about it. It stayed submerged with me in a creek for over an hour once. My best friend let it fall out of a moving Jeep once.
It looks like hell, but won't break. I have replaced all springs once and the recoil spring several times. I replace the night sights when they died. The only other thing I changed was to put a set of Houge grips on it.
The 220 is the ONLY DA .45 I have ever owned and kept. I love my 1911's and they are still my first choice, but would compare them to a sports car. Dink with them from time to time and they always perform, but you have to know them and care for them like a spouse. The 220 is a diesel pick up. Drive it hard, and it may never be fast or pretty, but it will get you where you need to go.
They are both good tools, but personally, I would buy the 220.... and I am one of those 1911 bigots that some people complain about. I have even considered buying another, and putting it in the safe in case this one does die someday, and give it to one of my sons when I am too old to hold it up.
BT