I’m not entirely caught up on how speed rules work on this site, but Sora scales to someone who can cross an infinite 5D structure in a finite amount of time. Meanwhile the Future Warrior seemingly only scales above someone who can cross an infinite 4D structure in a finite amount of time.
That stuff probably doesn’t matter though. In which case, FW can probably just blitz with all of his transformations.
That requires me to know what the scaling chain for DBX is, to be honest, and how FW acts in character. FW stomps if their first move is to spam Hakai, but if it comes down to them actually scrapping first, I’d need to know who’s stronger. Because if Sora is able to kill FW, then he BFRs him to Quadratum, a place he can’t come back from.