My reason for using lip butter is mostly texture, because I like when lips feel smooth without looking overly glossy. I tried regular balms for daytime, but some of them felt too waxy after a few hours. While comparing softer lip products, https://bitchstix.com/product-category/lip-plumpers-and-butters/ was useful for seeing options that were not just basic balm or full gloss. I would choose moisture first if my lips are dry, but for daily wear I also care about how the product sits on the lips. A good lip butter should make lips feel softer and look healthy without needing constant reapplication.