Rihaku
The Internet
The flexibility and esoteric abilities of Noble Phantasms is worth more than simply being able to hit and move faster in the end.
The main issue isn't which is better. The main issue is that Gil doesn't use them all at one time, whereas Odyssial would be using all of the power granted to maximum efficiency in acquiring more power, immediately. And at a certain point, stacked speed does beat everything, because you can just kill any enemy before they can react to use their ultimate defense.