EPortfolioLite - the web viewer for RAS is definitely stripped down. It comes with only 3 viewers (Interactive, Page Viewer, Parts Viewer). There are way fewer administrative controls, and far less functions. The user still has search and export functions but that's about it. RAS only has 2 security IDs (User and Admin). The upside is that RAS is free w/ CR9 Pro and I believe CR10 Pro with a new name. It works for simple deployment of reports.
The full EPortfolio that ships with CE is much more powerful and includes things like scheduling and distribution of reports, etc.