The one on Xbox One. While other genres like platformers or action adventures and especially RPGs do comparatively well on Switch, the shooters released so far are not the best sellers. That means Doom and Wolfenstein in the first place. As Doom Eternal will not be a late port (I hope), it might do a bit better, but I doubt it coming near XB1 numbers.
I wouldn't be so sure about that. While I agree that XBO will probably win, I doubt that Switch will be that far behind in the end. XBO will probably handily win the first week(s), but I think Switch version will have much better legs, crawling closer and closer to the XBO sales over time.
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454
The Steam/GOG key gifting thread: https://gamrconnect.vgchartz.com/thread/242024/the-steamgog-key-gifting-thread/1/