AFAIU, the passenger compartment will indeed have identical angle and acceleration in both cases, as there is no other way to cancel lateral force. What is lik

AFAIU, the passenger compartment will indeed have identical angle and acceleration in both cases, as there is no other way to cancel lateral force. What is likely different is the stability of tilted tracks (reasonably easy to make nice continuous tilts and turns) and tilted train's uncannily small lateral force, while still having time and angle discrepancies and inferior smoothness causing very noticeable over and undershoots.