The now Internet powerhouse Google used its blog today to call out Microsoft on its new open source 2010 Office suite.

A day before Microsoft takes its Office 2010 suite out of beta; Matthew Glotzbach, Google Enterprise Product Management Director, has posted a blog entry urging Microsoft Office users to forget Office and use Google’s new upgrade, Google Docs.

“If you choose this path, upgrade means what it’s supposed to mean: effortless, affordable, and delivering a remarkable increase in employee productivity,” writes Glozbach in his post earlier today. “This is a refreshing alternative to the expensive and laborious upgrades to which IT professionals have become accustomed.”

Google also posted a comparison chart which ran down the differences between the two software packages:

Source: Google Enterprise Blog, The Next Web