surfline is definitely much more mature, especially with cams and spot-specific forecasting. ariasurf is trying to take a slightly different approach, focused on being lightweight and easy to read, with 50k+ spots worldwide, custom coordinates for things like secret spots, hourly swell/wind/tide/weather, cams where available, and multiple languages

i’m still improving a lot of the forecasting side, so i see it more as exploring a different product experience than trying to replace surfline