Just as a matter of interest, I've run the numbers at Wellington, NZ with 25ºC vs 30ºC (yeah ok, maybe not entirely realistic for the windy city, but it does get warm sometimes), all of the speeds, thrust, take-off margin remained the same but the EO acceleration altitude changed. I don't think it is quite correct to just say that performance at one temperature will be identical to performance at another temperature assuming it remains below flex. The system seems to be using ambient temperature to calculate aerodynamic performance, and that does change.