Is there a difference between a differential cover gasket and a differential carrier gasket? If different thicknesses, is the difference critical on the carrier side?

Note: Felpro and many parts suppliers list Felpro RDS5088 as a differential cover gasket, and RDS5090 as a differential carrier gasket for 47-54. However, these are not the correct gaskets.

Last edited by wurlitzer46; 10/25/2015 4:38 PM.
52 3100 project
54 3100 / 3112 ice cream truck, next project