Mihawk pulls out a Butter knife and low diffs him.
Well, let's see.
Edo Madara in
VSBattles Wiki:
Small Country level with Kurama (Can summon Kurama to aid him in battle), Multi-Continent level with Susano'o and Majestic Attire: Susano'o (Should not be weaker than his Edo form. Can combine Kurama and his Perfect Susano'o together to increase their effectiveness and damaged Hashirama's Shin Sūsenju)
Edo Madara in
OBD:
Small city level+, small country level+ with Perfect Susano'o, country level+ with Kyuubi under his control
Mihawk in
VSBattles Wiki:
At least Mountain level+, possibly Large Mountain level (Fought against Vista), potentially far higher(Regarded as The Strongest Swordsman in the world in name and actuality. Once had a rivalry with Shanks, though this ended years before the end of the era)
Mihawk in
OBD:
Small continent level (cleaved a frozen tsunami spanning over 3 kilometers wide and 1 kilometer tall cleanly in two, the force of his cut also sent the upper half flying upward hundreds of meters, his duels with his rival Shanks, which were confirmed to have taken place when Shanks was already a Yonkou, were also said by Whitebeard himself to have "shaken the Grand Line")
Madara's speed in VSBattles: Relativistic.
Madara's speed in OBD: MHS (did Nardo characters take a downgrade in speed,
@Steven?)
Mihawk's speed in VSBattles: Relativistic+
Mihawk's speed in OBD: Relativistic with light speed reactions.
Let's sum this up: Mihawk's OBD profile beats Edo Madara's OBD version bcoz of superior AP and speed BUT Edo Madara's VSBattles profile absolutely anniliates Mihawk's VSBattles version. Multi-continent level vs large mountain level, I think it'd obvious.
It's up to you which makes more sense.
This match is more close than people might think of regarding both sides.