Come ON! Does anyone in their right mind honestly expect a $1700 arranger to sound identical to a $5000 one? I got a bridge up in Manhattan you might be interested in!
Arranger manufacturers have ALWAYS squeezed more sounds into less ROM for their MOTL and BOTL arrangers. They have always used less expensive DA converters, less hi-fi output sections. They have always dropped whole Parts off of Upper and Lower sections (vital for more complex layers). And if you EVER did a conscientious side by side, same monitors A/B of them, you ALWAYS heared differences in tone, punch and quality of sound.
As well you should!
_________________________
An arranger is just a tool. What matters is what you build with it..!