Pilot737
Your assertions may well lead you to disater one day.
The 900 vs 800 was just an example as a general guideline NOT to start acceleration (with 2 engines) BEFORE the single engine out published acc height.
Your perf ops know more than a simplistic view on excess thrust.
mustafagander
. Remember also that climb performance is directly related to excess thrust available and on both you have it in spades. That's one reason why it feels simply tragic in the sim with a V1 cut.
The reason may simply be lack of training/skills.