Let it be the J41, the 32 is a heap of junk and not remotely suitable for a route like BRS - ABZ.
Of course the EMB135 would be ideal, but I don't think that the initial load factors would justify the cost of operating it on the route, nor could EZE possibly gamble on losing the NWI - ABZ route to BMI completely, (unless they sub charted another one from the Nogs).