"All models are wrong. Some models are useful." is the way that I have heard this thesis quipped. I suppose "All models are wrong. Some models are more wrong than others." would fit Asimov's points better, but I've never actually heard that one
My father-in-law, something of a renaissance man, and also a long-time successful commodities trader, regularly uses your latter expression. The first time I heard him say it, I attempted to correct him (“some are useful”) and he confidently brushed me aside. As I’ve matured, I’ve grown confident that his (your) version is less wrong.
