People saying Snake boggles the mind...
i mean seriously, ftilt/dthrow until 100% then utilt. how hard is that lol? and marth being difficult coz of spacing... gee its soooo hard to spam retreating f-airs into a dtilt upon landing.
Any character with a stupidly good, quick and safe damage dealing move with a lot of KO options can hardly be called skillful. i mean seriously, G&W is considered one of the easiest characters to be good with, how is he so different to snake/marth? space your high priority damage dealing attacks all game and then KO at the appropriate % with one of many ko attacks.
meh
btw peach gets my unbiased vote for having a high difficulty curve
On the topic of marth: If you notice, he relies on your opponent messing up, if you look at pure theory and paper matchups, on the higher tiers and higher levels of play, he wouldn't stand a chance if the other player is flawless. He capitalizes on mistakes, which requires a highly attuned observational viewpoint. Even retreating fairs can be punished. Spacing is not the reason he's so hard, it's observation, and that's something not everyone can do. Marth has a lot of options, but they have
no margin for error.
Though peach imo is pretty hard too, especially the turnip, fair, combinations, but link has a nearly same game with bombs, except he has very glaring weaknesses (horrible recovery, anyone?)
Oh, and this is all opinionated, meaning it could apply as "What is harder for you?", or "What do you think might be harder for newer people?", and I don't consider anything that is dependent on a Tech like IC chains or Diddy bananas hard because once you master that, there's not much beyond that, whereas others have to memorize/learn ALL of the options against a scenario, like marth, because his are very articulate for punishing imo.