Unless something has changed since 11 and 10 they are the same software with some features disabled?
Here's the minimum requirements for PT12:
Minimum System Requirements:
Mac:
Intel® Mac with Mac OS X 10.8.5 (only supported below Pro Tools 12.5), 10.9.5 (only supported below Pro Tools 12.
, 10.10.5 (only supported below Pro Tools 12.8.2), 10.11.6, 10.12.6 (only supported with Pro Tools 12.8 and above) or 10.13.2 (Pro Tools 12.8.3 and above).
Please find version specific qualifications in the Mac OS Compatibility Grid below.
Intel® Core i5 processor
16GB RAM (32GB or more recommended)
Internet connection for installation
15GB disk space for installation
USB-port for iLok authorization (iLok 2 or iLok 3 required)
USB-port, FireWire-port or Thunderbolt-port for CoreAudio-supported audio device
Supports 64-bit AAX plug-ins in Pro Tools
Windows:
Intel® PC with Windows 7 64-bit (Home Premium, Professional and Ultimate Editions),
Windows 8/8.1 64-bit (Standard and Pro Editions) or Windows 10 64-bit (Enterprise, Pro, or Home Editions)
Please find version specific qualifications in the Windows OS Compatibility Grid below.
Intel® Core i5 processor
16GB RAM (32GB or more recommended)
Internet connection for installation
15GB disk space for installation
USB-port for iLok authorization (iLok 2 or iLok 3 required)
USB-port or FireWire-port for ASIO-supported audio device
Supports 64-bit AAX plug-ins in Pro Tools
Much less than PT 12 HD