They're both good, powerful and accessible editors (alongside a pile of other editors that people will swear on their children's lives are the best)...
However, nobody else on this planet is you. None of us shares your exact likes, requirements and thoughts. What I like in Atom might really piss you off. What you need from ST might not even be on my radar.
If you want to pick, try both and decide for yourself.
They're both good, powerful and accessible editors (alongside a pile of other editors that people will swear on their children's lives are the best)...
However, nobody else on this planet is you. None of us shares your exact likes, requirements and thoughts. What I like in Atom might really piss you off. What you need from ST might not even be on my radar.
If you want to pick, try both and decide for yourself.