If you're referring to the numbers trickflow posted on their website for the AFRs, I think you'll find that they took their numbers from the manufacturer. Hence, the numbers are originally from AFR.
Things like the pipe diameter and pressure can make a significant difference in test results when you're talking about heads that flow so comparably to one another.
Either way, I'll bet whichever head one goes with, they'll be happy with. I'm just curious because I made my decision to buy the AFRs before the TFS 205 CNC heads were available.
Chris