They say that, but I must have blinked because I didn't see them acutally SHOW an area where the X1X dropped frames. Honestly, it seems to me like DF makes far more of deal of absolutely *imperceptible* frame rate drops on the X1X just to placate Sony viewers. I mean, this supposed couple of frames dropped in rare areas on the X1X is "annoying the shit" out of you when the fact is you would probably never notice it if DF didn't say it exists.
On the other hand, the X1X version is running at a much higher resolution which *is* noticeable ALL THE TIME.
The two things shouldn't be given even close to equal consideration, yet DF kinda does. It's a false equivilence and it's been kind of blatant in a lot of DF videos, in my opinion. The choice with this game isn't between the PS4 Pro with great performance and the X1X with great resolution. It's between the PS4 Pro with much lower resolution and the X1X with much better resoulution. Judging from the evidence presented in the video, the performance isn't different enough to even consider.