question about 360 heads

Yes. Look for the letter next to the spark plug holes. Also, the numbers off the head. In basic form, OOTB so to speak, they perform about equal in street trim, ported or not. It's when your looking to push out some power there abit different in porting technics and amount of porting needed to have them perform equal.
All the letter heads are about the same. Valves not withstanding. (Apples to apples equal apples.)