If only Second City had to change its name because of lawsuits from New York City and doctors who gave second opinions.
In answer to the question, we have found that both institutions carry with them a great deal to learn and apply, although it is more inticing to get sucked into the social strata and obtain professional A.D.D. at IO. Second City actors tend to take their craft a little more seriously and IO folks tend to try and be in 100 groups at a time as validation.
I really want to take an improv class...but the concept makes me a little nervous. I really think I suck when it comes to improv, but I know I need to learn and develop.