I seem to be the exception here. I do not find one to be harder or easier than the other. Just different. Each gun has its own characteristics and this is just one of those. It definitely comes down to personal preference.
For my carry weapon I have a SA with a thumb safety. That's my preference.
My main home defence gun happens to be a DA.
Whatever you get, train with it. If you own multiple weapons train with them all and know them all. And all DA are not the same. They all feel different in my opinion. They each have their own stopping point, if you will, and learning the feel to each is obtained with practice. Don't rely on a gun you haven't shot and practiced extensively with.