What years on both boats? I don't know much about CS other then that are well built boats. I know that Oday has a couple of different 27 foot models depending on the year.
Also, are they comparable? Do both have inboards, condition, etc.
“Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover.” -Mark Twain