I don't think it's confirmed, but the rumor is that North America is not going to get the Sky-X version of the 6 cyl. Instead it will be traditional combustion with turbocharging. I suspect the same things that prevented the 4 cyl. Sky-X from coming to NA are still at play: poor gas quality, different emission standards requiring expensive and lengthy re-testing, etc.
So folks wanting better efficiency may be limited to the hybrid version. Any Mazda with an inline 6 engine is still exciting IMO. There is something special about this type of engine and its naturally balanced architecture and firing order. They just feel better than other engines, including V8s in my personal opinion. Only a V12 with an ideal bank angle improves upon the straight 6 engine for smoothness and feel.
With seemingly everything having a 2.0 liter turbo 4 in it these days it's nice to see Mazda take the chance here and go out with a bang before the big pivot to all electric comes in the coming years.