when one swaps the korean in-house pickups in the RG350, there is no guarantee the subsequant branded units would be 'better'. if it's still plugged into a small practice amp, tonal differences would be negligible.
basswood, as well as other wood types used to make guitar bodies, are graded components. besides the brand name & hierarchical considerations, it would translate to a difference in production cost.
eg: Ibanez GIO basswood vs Joe Satriani basswood