Yeah, that's about right. Gudao needed Servants to journey through Ooku, while Gordy was able to travel at least part of the way down by himself using his fists and magecraft.
Oh yeah I forget, Riyo Gudao is powerless without his 'bleached-dirt' diet. whereas Riyo-Gudako is basically Goetia.
Chief, do you have a moment?Nitocris...If things continue the way they are, the human race won't survive. We must do something to resolve these extraordinary circumstances.But there's two servants with him...Sneaking around this hour, planning for a betrayal?He's a tough opponent but so are we.I'll fight Astolfo. You go and play nice with Da Vinci.Will I be able to do it...?Well well...Even if you defeat a servant, you can't forget that I am also here...Oh well... I won't be as nice this time as I was last time.You're an idiot for coming alone.Let's take him hostage and force them to surrender.