Interesting matchup,I'm going to hold fire for a while on this.Hopefully you will get the response it deserves.
Difficult one to predict, since Jeffries is a matter of opinion, but I will have a go. I suspect that the Jeffries of the second Corbett fight, would have worn Charles down with jios sustained body attack, and his "new found cleverness".
So in a year ,from fighting Fitz and being hit at will and looking like a novice,Jeffries discovered this new found cleverness? You don't think the fact that Corbett was totally washed up , and hadn't fought in 3 years,flattered Jeffries a bit?