I see the "Modern C" on a lot of guitars. I've played them, and they are OK. I like the "Deep C" on the American Professionals. I have also seen the "60s C" on the AO 60s and Vintera 60s. I have not played one of those. How does that 60s C compare with the other two? I googled it and did not find an answer; the other two are easy to compare, but the 60s C is not. No, I did not do an exhaustive search, but after 10 minutes I did not find anything. I was looking for something that would show the cutaway profiles and did not see anything.