there isn’t enough data yet to say. I have the 15” 2019 with the i9 and I would definitely have preferred a faster GPU in retrospect.
It mainly depends on the thermals I think. If the 2016 has much better heat dissipation then you may be able to run more cpu intensive tasks on Resolume. I regularly see my i9 between 200-350% utilIzation while running Resolume with other stuff open in the background.
Certainly if you plan on running other programs at the same time it should be useful.
Also if you do a lot of video editing, and rendering, but again more RAM or a better GPU should probably take a front seat to the i7->i9 upgrade.