This thread is weird lol.
Let's take 3 shotos in their current form (USF4) and 3 ninjas from MK9
Ryu, Ken and Akuma share the hadouken/shoryuken/tatsu moveset. They've always had these moves no matter which Street Fighter you have played. Akuma's the only one to have special moves outside of these 3, with his demon flip and air fireball. The main thing that sets these characters apart is their playstyle (Ryu being a patient footsies character, Ken being a rushdown char and Akuma being a mix-up oriented character).
Scorpion, Sub-Zero and Reptile.
Scorpion has a spear, leg takedown, hellfire and a teleport. Sub-Zero has a freeze ball, slide, ice-clone and ground freeze. Reptile has an acid spit, 2 versions of his acid forceball, slide and elbow dash. Out of these 3 characters, only two share a single move out of them all. With their varied moveset, they of course play very differently from each other.
on the "teleports, tho" thing, let's flip that back onto SF.
Let's say in an alternate reality, Ryu/Ken/Akuma only shared the tatsu and each had insanely different movesets. Would you still call them clones? The only similarity at that point is their outfits and the one special move. Ermac, Rain and Scorpion are nowhere near clone status because of one special move.