React killed their JSX transpiler after Babel added support for JSX. Angular merely merged AtScript into TypeScript.
React had CommonJS module support from the get go. Angular1 was incredibly awkward to use with a real module system, Angular2 is only marginally better.
Ugh.
Personally, I really appreciate React+Redux... it seems to be the distillation of a lot of ideas. Also, good or bad, React has actually removed features in support of a better project/application workflow. That doesn't even get into how goofy I feel that Angular's DI system is (better in 2, but not good).
React has embraced the larger JS/npm community/tools and Angular seems to be actively fighting against it.