Right, all three did PETER PAN, but yes, they were two different productions. As you said, Bernstein did the production that Bernstein starred in. Comden & Green did the more famous production that starred Mary Martin (1954), Sandy Duncan (1979) and Cathy Rigby (1990-91; 1997-2001).
The concert should still feature songs from BOTH productions, but, my opinion is biased. :-P
For more information on PETER PAN, visit my website,
http://www.peterpanfan.comhttp://www.peterpanfan.com>http://www.peterpanfan.com (shameless plug).
"The Spectacle has, indeed, an emotional attraction of its own, but, of all the parts, it is the least artistic, and connected least with the art of poetry. For the power of Tragedy, we may be sure, is felt even apart from representation and actors. Besides, the production of spectacular effects depends more on the art of the stage machinist than on that of the poet."
--Aristotle