It just takes care of visual judder below 48fps, which the PS5 version doesn't. But the PS5 version doesn't drop that low as often as Series X either in Performance mode w/ RT On. Also, frame times would still be more consistent on PS5, regardless. Hopefully, VG Tech also does a comparison to demonstrate this.
Best performing version in Performance mode + RT On
Also, the text that you excluded from the quoted post literally explains why, above all, the PS5 version is best
You were missing a crucial feature in that list. Yiiiiikes!