The 210 was the mid level car between the 150 and the Bel Air. There are a lot of differences, many subltle, so just some highlights. Bel Airs had more exterior trim, stainless spear on the front fender that continued to the door, 210's didn't have those. The Bel Air also had more trim around the side windows. The 210 interior had a waffle pattern on the seat covers, the Bel Air had a cloth insert, vinyl surround. The 210 had a cloth headliner, the Bel Air could have either cloth or vinyl. From a fit standpoint, the headliners are the same, just the material could vary depending on the options chosen.