What is the difference between vicarious and substitutionary atonement?

I was just browsing around checking for odd theological beliefs held by our puritan church fathers. I read that Richard Baxter held to a penal and vicarious atonement, but not substitutionary atonement. There must be a slight difference, but just wondering.

Oh, what got to me to thinking about that is that I see on the Shout Box someone named McKinley asking 'Was J.C. Ryle a 4 pointer?' Since it is at the bottom of the Shout Box, there was no answer. I couldn't find one with my browsing. I did find out that Ryle would not be a puritan as he lived afterwards.

Last edited by John_C; Wed Jun 24, 2015 4:45 PM.
John Chaney

"having been firmly rooted and now being built up in Him and established in your faith . . ." Colossians 2:7