I've been growing both for couple grows, runtz be lot smaller than mimosa, both good yielders. I'm taking the runts out next grow to replace with different strains, nothing wrong with it bar not much flavour. The mimosa is a unique smell and flavour, one of my new favourites and in my top 5 strains to grow and toke. Only downside to mimosa far as I'm concerned is it's harder to clone, I take twice as many cuttings as I need, most strains i get 8 or 9 out of 10 cuttings but not this one. Under LED lights the mimosa will take up a purple hue on the leaves and a very easy trim, absolutely love it, all round fantastic plant, with a nice heavy stone if allowed to mature to its optimum.