I think typescript support was a priority aspect to be addressed for Vue 3 making it sort of a first-class citizen. The whole new composition aspect of it was to address large codebases and large-scale applications. So I understood that V3 makes all the difference if TS support and working on larger project is important for you. In fact, I think if you are coming from React and try it out, you are highly likely to feel right at home there.
It has much better Typescript support, and also it doesn't have Vue's spaghetti reactivity system, both of which vastly increase the chances of bugs.
I guess you could say they're more similar if you simply don't care about bugs at all.