They're both different in different ways is what I actually said. Jigglypuff plays similarly in concept due to their core point of both being air demons, Ganondorf plays differently by having such severe speed and power and approach differences that they're still nothing alike in practice.
I don't see any core difference in cloneage, because they're both ultimately the same level of differences. Just equivalent differences. JIgglypuff always shared moves with Kirby, those were just more A moves. It also played very similarly to Kirby in its first appearance, only separating in Melee. ...Ganondorf worked the same way, playing mostly the same as Falcon(but even in Melee, they still required a different strategy due to highly different statistics), sharing a good majority of A moves(less than Jigglypuff, mind you), and only the B moves. So what happened? Jigglypuff didn't get a huge change of A moves, so it still branches clearly from Kirby, still using him as a base to this day, sharing multiple animations. Ganondorf did... the same thing, but also changed up one B move entirely, and shares a pretty small amount of A moves. The differences in who has more unique moves from the original counterpart is... pretty subtle. That's because they're both semi-clones that are highly divorced from their counterparts. Just in, as I said, clearly different ways.
Though Ganondorf playing almost nothing like Falcon in comparison does matter, as he doesn't gain the same advantages either. Jigglypuff still plays fairly close to Kirby's style in practice. So there's a huge world of difference between Falcon and Ganondorf in practice, and... a smaller, but still reasonably large, difference between Kirby and Jigglypuff.
It's not just about animations, but playstyle because of using said character as a base that actually separates them heavily. Moveset Clone doesn't mean much if they play nothing alike too as a term. And even then, Jigglypuff is blatantly still taking from Kirby's moveset to quite a large degree, so it's silly to say it's actually not a clone at all anymore than saying Ganondorf isn't one. Both still borrow heavily while having some hefty differences(again, in different ways). There is no one-size-fits-all label for how they're handled. They're both barely clones. In he "moveset clone" sense. Model Swap Fighters? Yes, they'll always be that unless Kirby and/or Falcon get removed from the game, anyway.
For the record, Toon Link isn't really a Model Swap Fighter of Link either, for a nice interesting example. Despite this, he is a Moveset Clone due to sharing the same animations... by proxy. He was retooled from Young Link, not Link, as they didn't have remotely similar proportions to use Link as a base anymore(unlike Link to Young Link). In return, Ultimate used Toon Link to recreate Young Link. Meaning even by then, Young Link was no longer a Model Swap Fighter of Link(but still a Moveset Clone). I'm bringing this up to show that Model Swap Fighters and Moveset Clone are not actual synonyms either. They never were. They serve different purposes. Ness is a Model Swap Fighter, but he isn't a Moveset Clone. Falcon started off as both from Samus, though he's the most divorced from his counterpart as the original bonus characters were in 64(that could be a type of Moveset Clone). Coincidentally Ganondorf followed the same pattern starting from Brawl, massively diverging from the original. A ton of characters also share animations that aren't Model Swap Fighters by design nor any kind of Moveset Clone, further going into my point of how they don't mean the same thing.
The other thing to keep in mind is cases like Wolf where he has, what, sharing less than 10 animations from Fox? He's almost identical to the point behind Ness, using a similar model, but a completely different moveset. The thing you have to remember is it's not about pressing A or B specifically. Kirby and Jigglypuff still shares multitudes of A moves. Jigglypuff still at the end of the day is a Model Swap of Kirby, and is a divergent Moveset Clone. Not any really different from how Ganondorf is from Falcon. They follow the exact same philosophy; don't severely change their playstyle, but still change and give them new moves. (There's a very tiny amount of characters who outright changed playstyles anyway. Link since gaining the Gale Boomerang... as well as losing it as his Hookshot variants, Bowser going wrestler, and Pit losing his glide but also gaining some more unique moves in 4).