Been thinking about this myself and have not owned either - just handled them and considering both for my next builds.
The XRS feels beefier and I guess that is a good or bad thing depending on your use. I think it comes down to the accessories, I will likely go XRS for a .223 target shooting dream I have as it is heavier, easier to add weights, and you can install an adjustable butt plate (important to me).
That being said, I have been thinking the field might be a great option when it comes out in Tikka footprint to throw together a cheap/accurate hunting set-up that will secure the action, float the barrel, give me an adjustable cheekrest/length of pull, and make throwing on an arca rail easy.
But ya, just my thoughts considering those same stocks.