I'm working on my 1990 CRX, and I am doing a D16A1 swap; I know, I know, I dont want to hear it. My question is my motor came with two ECUs both are PG7s but one is marked 8X and and one 8Y, is there a difference?

Full ID codes on each are:

37820-PG7-L030, 684-109272 (8Y)

37820-PG7-A130, 683-115443 (8X)-this one was on the wiring harness and is marked 1988 Acura RS in marker.