Visual Studio 2012 introduced several platform-wide enhancements available in the ISO:
Microsoft Visual Studio 2012 Ultimate (ISO) was the top-tier edition of the 2012 development suite, designed specifically for enterprise-level teams. It included the full range of development, testing, and architecture tools that were absent in the Professional or Premium editions. Key Exclusive Features visual-studio-2012-ultimate-iso
Includes IntelliTrace for "historical debugging" (recording the execution history to find bugs faster), as well as Continuous Stress-Testing and Lab Management. visual-studio-2012-ultimate-iso
Advanced code clone detection to find redundant code and "Code Metrics" to measure maintainability. General 2012 Improvements (All Editions) visual-studio-2012-ultimate-iso
A redesigned, cleaner interface with reduced clutter and "all-caps" menus (later made optional).