Changing the stab to achieve the same relative incidence should obtain the same GENERAL effect. It will not, however, change the flight path of the fuselage. That is controlled entirely by the wing angle of attack for the given flight conditions. Changing the wing incidence would have done this.

I will let others with more experience in the area comment on any impact this may have on tip stalling. A thought or two though - the Staggerwing had flaps on the upper wing in early production models and switched with the ailerons at some point (or do I have that backwards?). I think the use of flaps, amount, and where will have a dramatic effect on the landing characteristics. Obviously, wing washout/in (read - 'warpage') will play a big roll, too. Another big roll player will be CG location.

Nice looking bird in th bones!

Good luck.

Bedford