I think training wise...Barbolini is better, he can make his teams work pretty well specially the defensive lines.
But as a leader I would say Caprara is way better, Barbolini lack that quality in him, he dont know how to work with big personalities and players, but maybe that could work in Netherlands, since all the girls have pretty much the same attitude and bond...but Im afraid if they need someone to push them during the games outside the lines, Barbolini would fail...Caprara is more energetic.