Why should my business choose Ubuntu?

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http://askubuntu.com – My office is going to buy a bulk number of desktop PCs (for developmental purposes). I encouraged them to buy PCs without a preinstalled OS and then install Linux. My colleagues agree with me but they are not regular users of any Linux-based OS, so they want to choose a Linux OS which is best for our purposes and user-friendly and I suggested Ubuntu. Now I want some data to support my position. So what I want is: Technical comparison of Ubuntu with Windows 7 Professional Technical comparison of Ubuntu with other major Linux OSes (openSUSE, Linux Mint,Fedora) Please share your source(s) (HowTos)