They are very different. On surface they have similar mechanics and features, but focus and execution is quite different. In AC there is no energy-system like i

They are very different. On surface they have similar mechanics and features, but focus and execution is quite different. In AC there is no energy-system like in SV. Time in AC is also way longer as it plays in real time. There is no need to sleep (as far as I known) and thus no penalty when missing bedtime. There is no real farming in AC, just collecting stuff, and a bit of arranging things. Overall, AC is very free from sources of stress, while SV has them everywhere, though it depends on yourself on much they impact you. Also, you can also get stress in AC, but only by setting yourself goals, not through the game itself.