Jarwin probably would not have gotten them TDs regardless, Witten knows how to get open, Jarwin isn't even close!
This is just a sample of what many are observing when it comes to Witten vs. Jarwin. Right now, Jarwin is a "mismatch player". He can be hard for LBs to cover when he goes deep. He's a decent route runner, but when you compare him to a future HOF TE like Witten, he will come up short in every metric that involves playing the game above his shoulders. In addition, Witten may not be fast, but he is still a "sudden player" and he can work in small windows to provide a good target. I like Jarwin in the role he's in and he may develop into a better pass catching TE, but there is no comparison between Jarwin and Witten at this point. Witten has shown why he's the special player he is thoughout his career. He has clearly worked hard to come back after a year of retirement, to show that he can still get the job done.