I wrote what was on the screen of the TV...and heard with my own ears. They mean the same thing....Mueller obviously said that he couldn't say whether he did or he didn't.
BUT I did notice you defenders leave out the 10 possible obstructions he did lay out. Mueller knows he couldn't prosecute him, but leaving it up to Barr...who had already stated before Trump selected him (obviously the reason Trump selected him) that the investigation was bogus to begin with, you probably don't want to go over those 10 possible obstructions Mueller found. When you try to have someone fire the guy who is investigating you, it's pretty damn obvious, other than to a Trump Toadie or someone hell bent on defending his every action, that is obstruction.