Yes every chip, even if they are identical 3570K, behave differently.
You may have had bad luck and gotten a chip that runs hot, or won't OC stably. But it does not happen often.
Mine for example max's out at 4.6GHz, no matter how much cooling i provide or what Mobo I use. It just becomes unstable above 4.6GHz. Not that I am complaining. Thats a decent OC for Ivy Bridge.