How does Internet Explorer 11 differ between Windows 7 and Windows 8.1?

windows internet-explorer browser windows-8.1 browser-testing

Here are 12 things MSFT lists as unsupported in IE11 on Win7:http://msdn.microsoft.com/en-us/library/ie/dn394063(v=vs.85).aspx#unsupported_features

Automatic phone number detection
Device Orientation events
Drag and drop touch support
Effects batching and stroke improvements
Encrypted Media Extensions
Enhanced Protected Mode (EPM) AppContainers (see below)
F12 developer tools UI Responsiveness (available after Win7 update)
High DPI support
Hover touch support
Link highlighting
Media Source Extensions
Pinned site enhancements
Screen Orientation API
Scrolling and zooming with touch and other inputs
Syncing across devices
SPDY

Windows 8.1 also uses AppContainers for Isolation in Enhanced Protected Mode while Windows 7 does not support AppContainers. http://blogs.msdn.com/b/ieinternals/archive/2012/03/23/understanding-ie10-enhanced-protected-mode-network-security-addons-cookies-metro-desktop.aspx

http://blogs.msdn.com/b/ieinternals/archive/2013/09/24/internet-explorer-11-changelist-change-log.aspx