I have the S1 and the S2, The S1 is a much higher quality product. I love the material of the S2 but it’s made so cheaply that three weeks after using it one of my ear loops ripped off and then a week after that the nose piece came out. I only use this for lifting weights in the gym. I don’t even use it for high physical activity. I would suggest buying the S1 over the S2 anyday. I reviewed this product before but doesnt look like they published my review.
Better than the S1 in terms of water logging, but the material in front of the mouth and nose feel thicker than the S1 and feels harder to breath through.
S2 is better for working out in a gym, provided you are not doing intense aerobic exercises.
S1 is better for aerobic exercises less than 30 minutes. More than that, it might be better to have 2 masks, to be swapped in the middle of the workout, to prevent waterlogging.