What is difference between these 2 Windows 8 products?

[Sajvinder]

http://www.amazon.co.uk/Microsoft-Windows-8-1-Full-Version/dp/B00FRAE7MU/ref=sr_1_1?s=software&ie=UTF8&qid=1435181519&sr=1-1&keywords=windows+8.1

and

http://www.amazon.co.uk/dp/B00EZD3I5C/?tag=pcp0f-21

Building a PC, build below.

What is the difference between the 2 and which one should I get for building a pc from scratch?

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-4690K 3.5GHz Quad-Core Processor (£178.00 @ Amazon UK)
Motherboard: Gigabyte GA-Z97-D3H ATX LGA1150 Motherboard (£89.96 @ Scan.co.uk)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory (£45.83 @ Amazon UK)
Storage: Samsung 850 EVO-Series 120GB 2.5" Solid State Drive (£48.26 @ Amazon UK)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive (£37.44 @ Aria PC)
Video Card: MSI GeForce GTX 970 4GB Twin Frozr V Video Card (£269.96 @ Scan.co.uk)
Case: Corsair 300R ATX Mid Tower Case (£59.98 @ Amazon UK)
Power Supply: Antec High Current Gamer 620W 80+ Bronze Certified Semi-Modular ATX Power Supply (£58.78 @ Amazon UK)
Optical Drive: Samsung SH-224DB/BEBE DVD/CD Writer (£10.06 @ CCL Computers)
Total: £798.27
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-06-24 22:36 BST+0100

 

[Reyaz123]

The OEI version will not come with free support from microsoft since it is like the same as OEM but the full version would. Also for the full version it comes with the choice of 32-64 bit OS and the license is transferable from computer to computer.

Hope this helps.