As far as real world sounds go any TOTL arranger can compete hread to head with any wprkstation period and in a lot of cases because of super articlulation , they will sound better even compared to the same makers workstation. The Motif Xf does not have SA and cannot compare in terms of real world sounds to the tyros.

we can debate sound palletts all day long but with the sampling capabilities on both workstations and arrangers it just a moot point as you can put whatever sounds you like to a degree on both.

All that you said about a workstaion in terms of creating original tracks from scratch and getting away from repetitive baselines and using the best sounds is true of pretty much all the TOTL arrangers . All you have to do is use the tools on the arranger.

And the example you posted of the Kronos is easily replicated by any arranger wiythout any difficulty at all. the same skills are applied and the same knowledge of editing sounds and laying down sequenced tracks apply.