Metal fury was literally the peak of the metal saga and shogun steel can't be compared with it. Be it the poor performance of the asymmetrical beys, the weak storyline or the fact that the characters have been changed, shogun steel is a flop. It is hard to do follow up after a season with an amazing plot and shogun steel fails abjectly at this.
Metal Fury is way way way more better than Shogun Steel. Metal Fury has more episodes and better beys. Also, Metal Fury has hilrious humor at its side, unlike Shogun Steel. The drawings are better, the voices are also better. That is why Metal Fury is better than Shogun Steel.