Wrong. Period.
Plink dashing ALONE is harder than KOF as a whole. Not to mention Instant floats, consistently getting ambiguous tri jumps, controlling flight canceled mixups off jump ins, character control on resets, etc. etc.
For reference, I play King, Hwa, and Leona. The hardest thing I have to do is make sure i don't get an accidental super when I want a dp with hwa, getting accidental dp's with king when I want a fireball, and linking a neomax with Leona. All the CC's for those 3 characters are super easy.
Dont' get me wrong, at an introductory level KoF is harder to get a hang of, but that's just because it's so different. At a competitive and functional level, Marvel has characters that are more difficult than KoF in general, Storm being one of them.
Yeah but a lot of KoF execution difficulty is just getting used to it. Once you are then there's nothing hard about it. Almost all my execution difficulties are with regards to getting around the games dumb shortcuts and huge buffer window. KoF is harder to get the hang of(hence being harder across the board), and that's it.
edit - and no, i'm not saying characters like wesker take any modicum of skill to execute properly with