I'll agree with that since at the moment I'm not aware of anyone who is porting the 270 heads for max power. The EZ heads have been around a long time and various shops have CNC porting routines for them. The very best EZ heads probably flow 40+ cfm more than the OOTB 270 heads.

So if a person wants an entry level head that has lots of room for improvement then I suppose the EZ head is the way to go. If you just want a nice CNC ported head out of the box then buy the 270 head.