Oh, almost forgot...
If you're doing strummed guitar in a style, there are some undocumented tricks. I recommend opening and studying Yamaha factory styles in a DAW. Take a look at the guitar parts (tracks).
Example: FunkPopRock.T162, track 12. You'll see a group of notes one whole tone apart, e.g., F-G-A-B. This is shorthand for telling the arranger to apply its internal guitar note table to generate a chord according to the chord root and chord type specified in the NTR/NTT. I haven't used this trick myself, but it might save you some time.
All the best -- pj
P.S. Michael B's StyleDump program is an essential tool. Thank you, Michael!
Please don't be bother, all of you because what I will tell, but, Korg's Guitar mode, regarding to a scale from 1 to 10, is something like 9-10, and Yamaha's guitar mode to 1-2.
Korg split the keyboard in 6 different parts in guitar mode. One of the parts uses some of keys directly for strumming or other keys for arpeggios. The second part (as Guitar mode of Yamaha do, but...) is that will uses keys as guitar strings, each key for each guitar string, one to mute the first six. Another part, a long part with 2 or 3 octaves of keys where you can play free notes (you will hear what you play) and so on...
Yamaha's guitar mode, as I said, uses only one part of Korg. But even so, on Yamaha when you play G you will hear G, when you play A you will hear A, and so on. On Korg, when you play C you will hear the sound of string by conversion of string according to the root chord, C# will be the second string, etc... So on Korg, when you play A-B-C-D-E, you will hear a real chord, but on Yamaha you will hear something very strange, the real sounds, which is very annoying...
So, in my opinion, Korg wins on Guitar Mode.
PS: Sorry if I was off topic, but I explain how the guitar mode I expected to be in Yamaha, too. I wrote some time ago a Guitar Mode channel in Yamaha, and it was very hard to make it sounds as it has to be.
Best regards,
Vali