Need Opinions. Have nothing to compare to.

Regarding the 4 dyno runs shown.
At what rpm was throttle fully floored?
I ask because the red run looks like it could have been part throttle to 3700 ?
That would be a perfectly normal explanation for the AFR going so lean before rich.
But then why would the dark blue or black run be so different? Was the throttle brought on much more agrssively?