Yes, the 7900 XTX is more suited to 4K with the XT being a better match for 1440P. The XT will also be very fast in Warzone 2 as the game engine loves AMD GPUs. The 7900 series no longer lose performance at higher resolution now thanks to the increased bandwidth from gen 2 infinity cache.
At 1440P, no current CPU (13900K or 7950X) is able to drive the 7900 XTX to a locked 99% utilisation in Warzone 2 at 1440P, unless you use maximum settings. If you run competitive settings, the GPU will only get utilised up to around 80% or so. Not bad itself, but it shows that there is untapped potential there for when a faster CPU comes along, such as a Ryzen 7000 with VCache.
Example (note the GPU utilisation as I jump from the plane and get down to the ground)
So with an XT being 10-20% slower than the XTX, this will be less of an issue.