Is "Wry sense of humor" the same as "Dry sense of Humor" and in any case what is it (or are they)?

The first I can find nothing on topic. People generally think the second is a form of "sarcasm", but that does not seem right to me.
Carl

I posted this question in the "fun with Words" forum and should have posted it here.

I did receive some excellent and humerous answers there and post it here just to correct my error.

Any additional answers will be welcome and great thanks to all those who have already helped.
Carl