There's a difference between a "startup" and a "lifestyle business".
I would disagree with that, they are not mutually exclusive. Some people create a "startup" to provide them with a "lifestyle business".
How about new lifestyle business referring to themselves as new lifestyle businesses versus referring to themselves as startups? How should a startup call itself not to be ambiguous?
Good luck with getting a consensus definition of "startup" on even this website alone. A lot of the advice that I read here is applicable to a "lifestyle business" - because I still have to make many of the same decisions with regard to product, marketing, hiring etc. I have some different constraints and optimization targets but that's true of any two businesses.