Code completion in WebStorm should allow input of partial patterns to narrow down the list of available methods in Code Completion.
In the example below, I type in 'React' followed by a dot and then the following characters C->O->N-E->N
In VS Code, it narrows the choices down to "Component" but Webstorm cannot match that input pattern. This is really useful for shaving off a few seconds of typing. Big productivity gains over time.
VS Code example