The last time I checked (long ago, when no IntelliJ frorks like PyCharm etc existed) Idea' code autocompletion was a way more smart than that of Eclipse. Also the screen space is less bloated with IntelliJ.
How is the screen-space less bloated? I thought pretty much all IDEs are the same: navigation tree panel, code panel, and optional extra side/bottom panel for log/test/debug/docs/etc. Also they're all super configurable.