It wont act like the WALK either.
the walk adds additional caster of 0.5degrees, as well as a stiffer bush, this in turn gives you dynamic camber on turn in(but none of the draw backs of negative camber)and a heavier steering feel due to the additional caster.
IMO the stress bars i think would create a negligable difference in comparsion, but if you are going all out then every little counts, but I always thought that if you went to stiff on your setup(incl ARBs) it might be great in the dry but when its wet you need a degree of flex or the wheels will let go much easier