For 30 years, each chapter — from Shea Stadium and old Yankee Stadium to Citi Field and the current iteration of the ballpark in The Bronx — has been shaped by the faces on the field. But with the milestone season of the rivalry beginning Friday in Queens, The Post decided to look at the off-the-field aspects of the showdown too. How do the Mets and Yankees compare in each of these areas? And who has the edge? Let’s break it down. The two stadiums Mets: After debuting in 2009 as the Ebbets Field-inspired replacement to Shea Stadium, Citi Field blends old with new as a welcoming 42,000-seat venue in Flushing. They kept the original home run apple from Shea outside and added a new one out in center field to keep the tradition going, while also unveiling the largest video board in MLB for the 2023 season. The design is also inspired by the old home of the Brooklyn Dodgers. Citi Field has more personality than the new Yankee Stadium, The Post’s Andrew Crane writes.…