I agree with
@Fortitude on Yamal's pace. His body will develop more as he becomes a full-fledged adult and he could become faster.
Athletes don't peak physically at 17. Messi was faster at 22 years of age than he was at 17. Comparing them on pace is disingenuous at the moment.
But Yamal is clearly the most talented player since Messi. His decision making and playmaking for his age is frightening. I've said he's the best player in the world this season, and I think more are reluctant to include him in the conversation because of his age, but he's phenomenal. His finishing is his biggest weakness, but he could easily remedy that with time.
In terms of comparing his innate talent directly to Messi's, it's still hard to look past Messi. I think Messi's probably the 2nd or 3rd most naturally gifted player of all-time, but I don't think Yamal is that far off. He's more talented than Neymar was imo and that's a high bar to me.