um no....
A= B does not equal to C. this means that sasuke could do better or worse depending on who he is facing.
Danzo's greatest weakness was his pride. He casually used forbidden jitsu, never really testing it or seeing its full abilities before combat. If he does not fall into that and intelligently uses the jitsu he is a powerful force.
Now he, himself, without any "augments" has powerful wind ninjitsu and 1 summon.
vs. A- lighting ninjitsu his only defense is his speed. He has short range tie-jitsu and with Danzo's forbidden jitsu and short-long range wind ninjitsu Danzo will most likely win.
vs. Oni- Danzo has more chakara then Oni but Oni has Dust release./ flying abilities. so most of Danzo's jitsu will not hit/Danzo's only defense is his forbidden jitsu... which runs out fairly quick. So Oni would most likely win.
vs. Mei- It would not be a hard battle for her all she has to do is capture Danzo and use boil release to melt him until his forbidden jitsu runs out. She has the type advantage with fire release... and another three to boot. and she has about the same amount of chakara.
Vs. Garra- He has less experience but wind jitsu vs. wind jitsu is almost pointless. so the only real thing to do is catch garra off gaurd and "slip thorough the sand" and kill him right there. Danzo would probably win this.