* Full code intelligence platform (not just code search) with Code Insights for tracking trends (https://about.sourcegraph.com/code-insights) and Batch Changes for large-scale refactors (https://about.sourcegraph.com/batch-changes)

* Precise code navigation (vs. more fuzzy-level nav), powered by SCIP (spiritual successor to Grok, the system Steve built at Google)

* More powerful search language beyond regex (supports comby.dev) + user-friendly (smart search)

* Works across multiple GitHub instances + other code hosts (GitLab, Bitbucket, Perforce, enterprise Git repositories)

* Self-hosted deployment and enterprise scale

cs.github.com is a significant improvement over github.com/search—kudos to the team there!—but is about feature parity with something like OpenGrok, Hound, or Google Code Search before Steve built and integrated Grok (primarily cross-codebase regex search).