From an experienced eye, there close enough to call the same. Variations from port to port & very other little things that effect the machines readings that show up aren’t a big deal unless there is a noteable difference in flow on the same exact head.
When I see a fully ported head flow 20+ cfm different on another bench, then I wonder WTF is going on.
I realize there a lot of things that can effect the read out from lack of coffee to less than credible porters trying to upsell there head.