Our Windows hosting is powered by Microsoft's Window 2008 64bit Server operating system. This is the latest version of this server class operating system and is a very good and stable platform for Windows hosting.
Difference in Pricing
Why is there a difference in pricing between Windows and Linux? The reason is that the licensing fees required for Windows hosting cost more. Linux is open source software which is maintained by individuals who are not getting paid for their contributions. The developers at Microsoft are getting paid. And as such to run the Windows software requires fees being paid to them. Thus the reason for the difference in pricing.
Which is better for reliability? Actually at this point it really does not matter whether you choose the Windows 2008 operating system to host your web sites or a Linux based solution. Both offer premium uptime and reliability and security. In the past people used to use Linux because of its increased reliability over Windows. But since the Windows 2008 release of their server software Microsoft has definitely closed the gap in this area.