Well, Aizen's sword was able to split a mountain (supposedly, it was actually Ichigo that did this) whereas Madara's PS sword was able to split 4 large mountains. Now, this is just Madara here, who is an ant compared to the current Obito.
Obito in his much weaker initial Juubi form was able to tear apart mountain sized energy barriers with ease. Now that he is in Rikudo form, we really have no idea what he could do. We've barely even scratched the surface with the latest chapter. But so far, he reacted to Minato in literally nano seconds; for God's sake, he held antimatter like substance with his bare hand like it was nothing. I wouldn't be surprised if Obito could consume a black hole for dinner.
The difference is clear.