My bad, let me go into detail.
What I was originally trying to say was that Toon link has more things to improve upon before reaching “Maximum potential” then Snake, which would make him naturally harder to master. Don’t get me wrong Snake is amazing in the hands of a good player but that’s just it the player has to be good.
What your trying to do here is list how much of the characters potential is used when someone first picks up a character for the first time without knowing anything about their technical, combos, or ability to deal damage and someone who knows and can do everything very well(that‘s the very vague way of putting it).
When Snakes mains go to practice mode they have very few things to work on because of Snakes extremely poor ability to combo and for the lack of technical things they have to work upon. Outside of Cooking, Snakedashing, learning exploding radius, c4 recovery, and infinite grab on the edge the only thing they have left really is working on spacing (Snake may have more technical abilities I‘m not aware of but from all the snakes I‘ve fought this is pretty much all they ever use). However because of Snake’s lack of good aerials approaches he really only need to work on ground spacing. Everything else is all user experience and mind games.
Needless to say many people have already master or nearly master Snake current meta game by now because of how few things they can really work on. What separates theses people from tournament winners is experience and technique or style.
Now this isn’t the case for all characters in Brawl one of the better examples would be Toon Link.
...I would continue but I need to go to sleep so I’m going to finish this on that note.
Feel free to question what I just said. Night