Arranger keyboards are for the Walter Mitty that resides in many of us.

Generally playing most any instrument that is not keyboard based will seldom fool a player of the real instrument.

But, part of the playing experience of arranger(or synth) using samples of other instruments, is to paint with different colors, and not really try to fool anyone...generally it's done to give the "impression" of a guitar, or trumpet, or whatever.

Having said that, I heard Kenny Kirkland (Sting's former keyboardist...RIP) play a PSR-8000 with a distortion guitar patch, that was pretty incredible...sure turned a lot of heads, especially guitarists, who were awestruck.