Tourist, I am with you on that one.
Angle of attack only relates to the angle between the trajectory and the body axis. The outside world does not matter at all (downwind turn anyone?).
Where the earth reference system gets involved is in defining the direction of the weight vector, which affects the left and right wing equally.
There are only three things that affect local angle of attack differently on your right or left wing in a turn: yaw rate, roll rate and aileron deflection. Also the propeller slipstream but I'll leave that one aside.
You will exhibit a yaw rate in a turn, which means lower speed for the inside wing thus higher local angle of attack. Roll rate is zero once a turn is established, thus no effect. Aileron deflection in a sustained coordinated turn will be positive or negative depending on the turn rate and the aircraft stability parameters. On most airplanes in shallow turns you will hold a bit of aileron in the direction of the turn so that means your outside wing will have increased local angle of attack. If you slow down or pull g's and stall in that configuration, your outside wing will stall first.
In a steep sustained and coordinated turn, with most airplanes, you will have to hold opposite aileron. This is to compensate the reduced lift of the inside wing which now has a much lower speed. This increases the inside wing angle of attack which is already high to start with, so your inside wing will stall first if you slow down (or pull more g's).
I hope this clears some confusion.