React is more mature, as it has a much larger ecosystem, community, employment opportunities, corporate support.... Vue is simple and delightful when used in small projects. In other words, they are not comparable.
Vue is absolutely a lot more delightful compared to React even in large projects, thanks to fine grained reactivity which React still lacks after all these years (I know people have come up with various bandaids). React wins in ecosystem, i.e. the breadth of available libraries.
