Windows 8.1 has more enterprise features than Windows 7, with Windows to Go featured on the Enterprise edition allowing users to start a personalised version of Windows from a USB or any other machine running Windows 7 or 8. It also means that the Windows Store is enabled by default, allowing users to access apps across multiple machines.
Read more: http://www.itpro.co.uk/desktop-software/21919/windows-81-vs-windows-7-which-is-best-for-you#ixzz3l7DwhyE3