Board Thread:Versus Debates/@comment-29994364-20161028174112/@comment-3965545-20161115201746

Like McPowa said, sharingan, ms, ems, rinnegan.. they don't give physical boosts like speed etc.

Sasuke is the same speed vs Itachi as he is vs Kabuto. You need proof for Itachi's speed then go to his wikia page and check out the refs that go along with the speeds.

In terms of speed without TTJ and other given enhancements

Itachi > Sasuke > Madara

and Itachi > Sasuke > Obito.