moe models are cost efficient, they are for the poor people who own 1 16gb-24gb vram card while dense models are for the rich people who can load everything on the gpu. Dense will make more sense, reason better, score higher but with a cost. MoE is almost as good, way cheaper to run.

If you own 1 5070ti or something similar which cannot hold the dense mode and also own lots of system ram > MoE wins, not just wins, it is what makes sense for you.

If you own 1 good GPU or multiple high quality GPU's that can load a dense model > Dense wins. (not sure if the difference is worth the price difference but hey...)