Yes and no. Fender calls it a modified "Bassman" tone stack, but that's just marketing BS. As for the tone stack, it's two simple changes to increase midrange.
- The Mid tone capacitor changes from a .47 to a.22, but some BF Fenders (like the Super Reverb) have this cap stock
- The Bass pot has a 18K resistor in series with it...all this does is make it so you can't turn the bass all the way down
I don't think these new amps will have the Custom Channel voicing. This seems more like an expansion of the '68 Custom moniker to any non-historical mod to a historical amp..add reverb to the Vibro Champ, it's a "Custom," make a one channel Pro Reverb, it's a "Custom."