Mistress vs. FLR: Where do you draw the line?

I’ve been reflecting lately on the distinctions between the role of a Mistress and being in a committed FLR (Female-Led Relationship). While both involve a dynamic of leadership, I feel like there’s a difference in intent, scope, and daily life structure.
I’m a Domme currently looking to transition into a more intentional FLR, and I’m curious about how this community defines the difference. To me, a Mistress dynamic can sometimes feel more focused on the 'act' or the session, whereas an FLR feels like a total life commitment to the partnership.
How do you all define the difference? Do you see them as overlapping, or are they entirely separate paths in terms of how you build a relationship?