I'm gonna do what I haven't done in a long time and make a serious post.
The insurmountable wealth of ignorance in this thread summoned me.
I had to squash it.
I can't see it as 6/4 because 6/4 implies that the only reason one character wins over the other is due to a few small advantages. This...isn't small
A 60:40 shows that there is a clear advantage but not enough to make it a walk-in-the-park.
When it comes to ratios, it's more than just "what options do we have" or "how much we shut down your character", but there's also the
quality of your options and how much they impact the match-up.
You (the Marth boards) say Marth has a clear range advantage. Guess what? So does about 85% of the character has a range advantage vs Mario. This is nothing new and doesn't exactly set the match-up.
You say Marth shuts down ~90% of Mario's game. Ignoring that fact that this is not true, I'd say that 10% is all we need because of the
quality of Mario's defensive options. Fireball, FLUDD, and camping are good quality tactics to use against Marth.
You say Marth can powershield fireballs, I say who cares? The fact that you're not zoning me and I can go on the offensive is an advantage in of itself. If you're powershielding, that means you're not attacking me. If you're not attacking me, I have all of my options open.
You say Mario has to wait for Marth to screw up in order for Mario to take an advatange. I'd say the fact that Marth
can't screw up since Mario can punish heavily from it is reason enough that this is no more than 60:40. If you can't screw up, that means you always have to be on your A-game. And lets be honest here, no Marth player is perfect. Basing any match-up on perfect players is moot.
Then there are the clear advantages that Mario has which consist of a good combo game, shutting down Marth's options when Mario is within range, gimping Marth's predictable recovery, and having an equal if not better KO power than Marth minus the Tippered F-Smash.
What makes Metaknight a 65:35 is the fact that he
does relinquish all of your options and forces you to wait it out and stay back the majority of the time. This isn't the same vs Marth. Mario has defensive options ready to use against him and we clearly have solid advantages. This is why I firmly believe this is no more than a 60:40 Marth Advantage.