It’s hard to imagine that even if you were to buy both and shoot them side-by-side, there would be enough accuracy difference between them such that you would be able to see a clear winner. Rifles are just so good now, it just is exceptionally rare to compare 2 rifles of a similar level and be able to see a .25 or even a .1 MOA difference.
Both of these rifles have been extensively reviewed in Shooting Times, Rifle Shooter, etc and are broadly considered to be excellent shooters. With custom load development for the specific rifle, I highly doubt that you could see any consistent difference that couldn’t be attributed to the biggest variable of all–the shooter.
Grouse