Just found this thread...
The RGT3120 is VERY similar to my JGRG-1s (aka JCRG21A). The neck finish on mine does the same "blend" and is gloss finish from heel to head. Front mount nut is the same. JCRG21A does have the "scraped binding" on the body, but it's not very noticable as it's actually painted over a bit with the trans finish (looks like they stained it and then used a trans finish)
With the exception of the neck profile, the only differences I can see are:
1) 3 piece vs. 5 piece neck
2) Lack of GK pup and controls
3) Front mounted pups vs. Rear mounted
Most of these are "nice to have" but not critical, so it looks like a scaled back JCRG21A (and several other similar models (9570 as kuma said), I'm sure).
What pups in the RGT3120?
They are sweet. But they're HEAVY. (no complaints here).