is there a difference between the 90-91 92-93 corner lights?

 

Yes, there's a slight difference between the two. The headlights mainly, on the 92/93 accord have the upper edge of the headlights curverd to along with the design (shape) of the hood. And the corner lights just simply follow part of the headlights shape.

 

Different part numbers and slightly different shaped;
PROVING my signature link correct AGAIN

 

but 90-93 corners will still fit each other regardless.