When I first came to the US lists some years back, I had to have all the abbreviations explained as in my country we only had two expressions, and then it seemed to me that 'kink' and 'bdsm' were the same. But now I see people distinguishing.

I would like to hear about this.

Is 'kink' different from bdsm, and if so, how?
Has there been a shift in how the expressions are used, somehow?

is one better than the other?