I think you'll find that the training required is for any 'difference' within your SEP class rating - i.e. there is no separate class for a 'complex' like the FAA system.
Therefore, a PA28-236 as described might cover you for VP/CS props and perhaps turbocharging but (obviously) not for retractable U/C.
I annotate all of the separate 'differences' when I sign 0in case future viewers of the logbook are unfamiliar with the type.