The lack of a tipper/sweetspot is absolutely different gameplay. Outside of Ken, they're the only ones to really stand out due to a completely different gameplay mechanic. The rest are barely tellable beyond aesthetics.
The only two with no real tangible differences at best are Peach and Daisy(hurtbox differences. That's it. Dark PIt has different moves here and there. Chrom and Lucina have to be played differently to be effective, which they're actually easier to play because they lack a mechanic. Richter has a different element for one move, but otherwise is pretty much the same. Not different from Dark PIt in that case. Ken is a stand-out by being super unique). The rest have some actual individuality to some degree. Even some smaller ones.
Marth literally has one clone. Roy stopped being a clone of Marth since 4. They're only slightly similar now, but vastly different these days.
Also, Toon Link isn't remotely the same character from regular and Young Link. Or even TP Link. They're completely different people(and by all means, different characters too, since they're different shapes, sizes, backstories, and even abilities in many ways). They just have a similar body design due to many completely different people named Link and that makes it easy for cloning to work.
I completely disagree that Roy is similar to Wolf in clone status.
-Roy still has the same Neutral-air, Up-air and Back-air as Marth.
-Roy still has the same pummels and throws as Marth.
-Roy still has the dancing blade just like Marth and still has a counter like Marth.
-Roy still has the same Down-Tilt as Marth.
-Even though Roy has a different animation for his Forward-air, it functions identically to Marth's forward-air in terms of hitboxes (Not sweet or sour spots)
-Even though Roy has a slightly different Neutral-special and Up-special, their functions are similar.
So I stand by my point that Marth still has three clones.
As for Toon Link, he is still a Link. He is just like every other Link, it's just that he was born in a different place. Same destiny, same journey, same personality (Or lack of it), same Master Sword, same Zelda, same Ganondorf, same Link, same Fighter. In fact, he is comparable to Young Link.
-Both are fast and weaker versions of Adult Link
-They both use a hookshot to grab.
-They can wall jump.
-They use standard bombs.
-Their spin attacks multi hit.
-Their Boomerangs act the same.
-Same Neutral combo, Up-tilt, Down-tilt, Forward-tilt, Dash Attack, Down Smash, Up-air, pummel, Up throw and Down Throw
Sure Toon Link does have unique attacks but his status as a Link makes him look more of a clone than characters like Falco. I can barely count Lucas to be a clone because the only moves that he shares with Ness are his Forward Smash, his pummel and the special moves and even then that's reaching since the differences between their functions are night and day.