There is no difference between tilted track and tilted train from what you can perceive from the passenger compartment, provided the tilt is done correctly.
I suspect tilt angle was perhaps rounded/approximated/delayed, which would feel the same as if someone had laid the track rather haphazardly on a bog...
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.
I suspect tilt angle was perhaps rounded/approximated/delayed, which would feel the same as if someone had laid the track rather haphazardly on a bog...