What is the difference between Windows 8.1 Professional, Standard and Core?

windows8.1 Professional Edition, Standard Edition, Core Edition What is the difference?
Windows 8.1 Core Edition: This version has the core functions of Windows8, with all the commonly used windows functions, suitable for general users, does not support disk encryption, no Support built-in virtual machine, scalability is poor, you can upgrade to the professional version. Windows 8.1 Professional Edition: is a system for individual users, IT enthusiasts, developers, with all the functions of the windows8 system, and the overall function of the enterprise version is similar, does not have windows to go function, but can upgrade the windows media center . There are also two versions of the enterprise and RT versions, and the RT version is for the ARM architecture, a general user tablet.