raptor is an off road truck lol, if they do come out with a trx it's still gonna get beat in the offroad segment but it will be faster than the raptor, different segments.
I'm not a brand loyal guy but Ford has been killing it for a while, up until the new gen was released both fca and gm were way behind in the truck market. ram has caught up to the f150 and is even better in certain areas, the new gen f150 should be released next year so we shall see what ram and gm do as far as updates go, the f150 is sort of the gold standard in the industry similar to how the 700+hp from the hellcat has become the gold standard in performance cars or the S class in the luxury car segment.
As far as the original question goes I would think about buying a trx, but I don't drive a pickup myself so probably not.