The full throttle height of the Spitfire Mk XVI in AH matches that of the Merlin 66 in the Spitfire LF.Mk IX, not the full throttle height of the Merlin 266 in the Spitfire Mk XVI, so we don't actually have a Spitfire Mk XVI in AH, we have a Spitfire LF.Mk IXe.
I wonder how many people would complain that the new Spitfire LF.Mk IXe wasn't as good as the old Spitfire Mk XVI and ask for the Spitfire Mk XVI back if HTC were to simply change the Spitfire Mk XVI's name to "Spitfire LF.Mk IXe" in AH?