Thats also exactly it. What is a big port? I guess we could say that a 225cc intake runner on a 300 or less sized engine is to big for the grocery getter car that mom drives unless she is as twisted as they get.
The same rod the reverse. What’s a small head?
I say let the dyno tell you and have a realization that even though the dyno says “WIN WIN”, it may not be a good thing in the street. Or even the track for that matter.
The biggest thing is the Knowledge of what works for what arena and how to do it best for your particular situation.