AP: Sigurd is a little over 2x, but with Cole's massive scaling chain he's much higher then that so it's not really that big.
Speed: Cole is around 2x faster, really not that big.
Abilities: Cole has an unbelievable disadvantage in Close Quarters, not only is he tremendously outskilled but he dies in a single cut, however due to the 2x speed gap he's not completely screwed the moment Sigurd gets in his face as he has the speed to dodge the initial sword strike and get out of range
Now the biggest advantage for Cole, and the reason why I think he barely, and I mean barely takes this, is due to is lightning stasis and his range.
Cole will be starting 4KM away as per SBA, and he has more then enough time to range spam Sigurd as much as possible with homing attacks, and electricity, while it won't instantly impede him, will slightly paralyze him and make it harder for him to close the distance,
Cole takes this 6/10 times I feel, his massive versatility and range advantage combined with his small speed advantage will give him, in my opinion, enough time to wear Sigurd out despite his skill advantage and info analysis
Before someone mentions Gram, 4KM gives Cole tons of time to move out of the way before getting out of range of its, and then wearing own an exhausted Sigurd.