Yes, the G70 can play BK-7 styles. Obviously, they will need some Makeup Tooling to use the older sounds, and some of the guitar parts will sound different because there is no MFX on Style Parts on the G70 (unless you use my IFX trick up at R-A.com). Plus there are some better kits in the BK.

But with work, you can get close.
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An arranger is just a tool. What matters is what you build with it..!