If it were me, I would choose fitness, because I have learned to dance before, and my body hurts when I go home every day. Personally, dancing is better for fitness, but losing weight seems to have little effect. But you are just tired and painless. The effect of losing weight should be better, so fitness is better.

Finally, if you want to lose weight, a reasonable diet and active exercise will do. For example, it's useless not to eat, and you may gain weight again.