I would use the second option. You can use the first one but as of now it seems like its for upgrading to Windows 8. The second link is for upgrading to Windows 7 but can technically be used to test compatibility for windows 7.
My Computer
At a glance
Dual Boot: Windows 8.1 & Server 2012r2 VMs: K...A10 7700 Kavari SteamRoller8GB DDR3 SDRAM PC3-85001024MB ATI AMD Radeon R7 Graphics
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Custom
OS
Dual Boot: Windows 8.1 & Server 2012r2 VMs: Kali Linux, Backbox, Matriux, Windows 8.1