That’s ridiculous. Windows 10 runs perfectly fine on 4 gigs of RAM. A casual user does not require more than 8, either way.
Heck I am typing this on Asus Transformer with 2GB of RAM running Windows 10. :-)
The OP said he wants this for light duty word processing and surfing. IMO he should buy the cheapest device that meets his needs, back up his photos and docs regularly and not overthink this decision.
A light duty computer is a cheap disposable commodity. Use it til it dies than just buy another one.
So WIN 10 is ok now? I thought it was spyware.