Consider a nine-degree loft for spin reduction
The speaker says standardized equipment comparisons usually keep shaft, loft, ball and tee unchanged. In this case, though, they say using 10.5 degrees would be wrong because a player needing spin reduction could only get it from the available nine-degree option.
Channel: Club Champion
Watch official source at 17:46Why this context matters
The recommendation concerns fitting a high-spin player, not preserving a standardized test variable.