I suppose a x1.1 gap could work. Tao had Goku on his toes when he pulled out his sword, and he was still capable of landing hits and hurting Goku even without it.
Even Akkuman made Goku use more effort when he used his weapon, so I don't think that is a huge feat for Tao. It's still a feat, just not a deciding one imo.
1.16x. Goku had the clear advantage the only hits Tao landed were hits Goku let him land. Don't get me wrong it wasn't quite a stomp but it was by no means an even fight.