bane wins low-mid diff and valkorion and sidious at eoo and de is either way but kotet valkorion wins extreme diff due to having more control and ability over his power
in my opinion; i honestly cannot really decide between EU Sidious and EOO Valkorion, it could literally go either way. In sheer Force Power Valkorion may take the upper hand, but in a lightsaber duel Sidious wins Darth Bane wins High-Diff imo