You’re comparing the same head which is fair.
Your not comparing the same level of work don’t to the heads ports. Not fair.
The Bloomer head is larger in cc’s leading to a belief that the port is carved differently and is superior. With this info and other posted in the heads cfm results, I do believe the head, at least on paper, is better and has better ports. I don’t think this is an argument.
The smaller port has been done so by the company as a safe porting (if ported) so there is no issues and leaves room on the table. On purpose.
It’s just a whose port is better. The are route taken by the company for the hope of zero issues anywhere or the full tilt (or close to full tilt) customer ported highly developed highly researched porting.
Does this make sense?
What you have as another difference is a readily available head (or soon to be) from AFR VS a guy custom porting as many as he can with his desired level of quality.
Big difference on the same casting.