Suggested by Destroyer Erza is a powerful swordswoman who has defeated just about every foe in her way. Her guts and determination have taken her far and they should be enough to even counter Ruby’s speed. Ruby’s attack power isn’t quite as deadly as Erza’s and so Erza will be able to tank every blow until she finds an opening. You can’t compare the battle experience they each have either so Erza’s definitely got this match. Erza wins.