Chromium is the open source project that Chrome the proprietary browser is built on. Chrome is basically Chromium + some proprietary bits, Google branding, and

Chromium is the open source project that Chrome the proprietary browser is built on. Chrome is basically Chromium + some proprietary bits, Google branding, and Google features. Chromium, while being open source, is a project run by Google, so they have the final word on what is included in the code. They don't just have enough influence, they control it.