http://www.tomshardware.com/reviews/internet-explorer-10-chr... In the 40 tab test, Chrome used 1619MB while FF only used 872MB.
This memory bloat is why I switched back to Firefox. After reading this article I fired up Chrome and it loaded about 20 tabs, then a message popped up: Close programs to prevent information loss. Your computer is low on memory.
Looking at the old browser comparisons on Toms, I can see that Chrome's memory has ballooned from 991MB in Chrome 13 to 1619MB in Chrome 23. This is a real problem. I wish Google would return to it's roots of making a lean responsive browser.