For me Lemmy is more accessible so i use it even that i know that kbin can not only see stuff from lemmy and kbin, but mastodon too (at least following people is possible)
So kbin has more features. As i was testing it there where some conversations about people switching for the better algorithm.
I think kbin is in general (with features) better but i like lemmy more.
But didydrogen monoxide is also known as hydroxyl acid, and the major component of acid rain.