B18a-b18b?

what IS the overall differences in these 2 motors and do they interchange with each other in the tegs?

b18a is older model of b18b. Not sure about years. I think they might be different OBD's too. When it's all said and done, they are the same engine. non/vtec integra.

fISH...

early B18A's had less power, 90-90 130HP/125 ft/lbs, 92-93 140HP/126ft/lbs. and 94-95 B18B was 142HP and then in 96 it dropped back down to 140HP.

but parts will interchange between them.