What is the difference between ETrade and power ETrade?

Excuse me, could you please clarify the distinction between ETrade and power ETrade? I've noticed both names in the world of finance and investing, but I'm not entirely sure how they differ from each other. Are they separate platforms or does one serve as an upgraded version of the other? Could you elaborate on the key features and services that set them apart, and how they might cater to different types of investors? Your insights would be greatly appreciated.