Oh man..... I love Jeudy. Can't deny it.
Both are so damn good at what they do. Jeudy uses his intense short area quickness to elude press while the threat of Ruggs deep is an ever present nightmare.
I think what you are actually witnessing in that .gif though is the true gift of Jeudy. By that I mean, the CB covering Ruggs has cheating eyes. Noticing the route, and possibly the arm action of the throw to Jeudy allows Ruggs to slip past him.
Of course the inside shoulder fake of Ruggs is perfect as well.
I think the thing you need to keep in mind is this: Does Ruggs play with such intense speed (like Tyreek) that he will make all CB's who are "fast" look foolish by comparison? Is his elite speed so glaring..... that he will be dominant against any and all CB's that cover him. I'm just not that sure personally. There are a ton of fast dudes in the league. And his routes almost always are blow the top off of the coverage routes.
Jeudy has an Elite..... Not seen often in the world trait. I will let the combine be the final judge, but that short area "juke"..... Cheat code level "shiftiness" is off the charts elite.
He will be automatic on "hot routes". Automatic on any man to man level coverage once he and Kyler form a bond. He will almost have to be zone covered at all times because no CB I have ever seen can use technique, power, or veteran moxie on his level of short area quickness.
In short: Jeudy's route tree is not only unlimited..... It's so sudden, violent and varied that in-game adjustments (by K1, K2, and JJ) could overcome any defensive game plan to guard him.