What is the difference between E-Trade and power E-Trade?

Excuse me, could you elaborate on the distinction between E-Trade and power E-Trade? I'm curious about how they differ in terms of services offered, user experience, and any unique features that might set them apart from each other. Are there any specific benefits that power E-Trade users can enjoy that regular E-Trade users might not have access to? Additionally, is there a cost difference between the two platforms, and if so, how does it affect the overall value proposition for investors? Thank you for your time.