Korg doesn't have a monopoly or advantage of edit-ability to have that unique sound . Both the TOTL arrangers, the Tyros 5 and the Korg PA4X have easy play features, voices, styles, and default setups with one button presses. editing is massive in both keyboards to alter the sounds and settings to your liking for your own unique sound.

Main different is Yamaha got the default sounds so good and realistic that most Tyros 5 users don't have to tweak and fool around with the settings. If it ain't broke, don't fix it.

Each keyboard has advantages, features, and edits different from each other. Depends on the needs of the user and whether the addition features and total quality of a TOTL arranger suits them or budget.

Finally, Korg is catching up to Yamaha in the guitar department. I still give the the edge to Yamaha for both the acoustic and electric guitars, and the amp and DSP interface to adjust or dynamically change your parameters for live effects.

The Yamaha PSR-S970 is a great buy for one of the best guitar voices and guitar DSP effects. The SA effects add that extra dimension, realism and manual nuance control over those voice selections found on the Tyros 5 and similar in concept to the DNC voices and buttons on the Korg.

I would assume that the Korg DNC effects can be assigned to pedals instead of having to remove one of your hands from the keyboard to press or activate these effects.

On the Tyros 5, you can assign ART 1 & ART 2 button effects to pedal controls, plus using your expression control. For my convenience and easy of using all these controls at the same time with one foot, for ultimate guitar voice realism, I combined all these controls on one simple modified Yamaha FC7 expression pedal. Not only different SA effects assigned to each right and left button, but even control the a "Wha-Wha" effect live assigning the expression pedal to one of the amp 'Wha-Wha" DSP effects. (see photo)

I still haven't heard any VST set, controlled by a keyboard, that beats the realism of the Tyros 5 SA2 voices. A good selection of SA2 expansion voices are reasonably priced for added variety, plus editable Sound Set, plus fully adjustable, Vol, Pan, DSP blocks, filter, harmonics, tune, effects, EQ, and compression to name a few. If one choices to use the default settings, then perhaps similar playing style could make a voice sound similar between two Tyros 5s or another Yamaha model with the same voice and default settings. Would this not hold true for other brands as well, or even one using studio programs with similar VTS sets and default settings?

The following MP3 is one of the best examples of the Tyros 5 SA2 voices I have heard. No VTS recording I have heard comes close to the realism and user control the Tyros 5 has.

"A Christmas Song"

Instrumentation (Tyros 5):

Tenor Sax S.Art2! (internal) Lead melody-Bridge and Improv. (Full compass used)
Muted Trumpet (S.Art2!)
Romantic Strings
Sax Section
Clarinets and Flutes
Glockenspiel
Pop Piano
Accoustic Bass
Jazz Guitar (Mega Voice)
Orchestral flute and Harp
One Live Drum Track
Dreamy Ballad Style BP=63

https://app.box.com/s/e3eykkc2mdnu523zo1o3ywn627p6onh2

Regards, Marcus