If JDS chin has declined to much after the substantial amount of punishment he's taken in the last few years, it might only take one Rothwell flurry to put him down?
But "the balance" of the matchup, however, favors JDS skill sets. If JDS keeps Rothwell on the end of long, straight punches and overcomes a few difficult moments to take a decision.
I mean Rothwell is also mostly a striker, though of a drastically different kind.
JDS is still faster and more athletic, the quickness of JDS allows him to get in and out behind a sharp jab and vicious straight right that he mixes up to the body and head, but Rothwell has pretty high fight-iq, and it doesn't take genius-level movement to stay away from JDS.
Rothwell is bigger, and have the durable advantage and the most diverse MMA-game.