UE4 Scaled down to run on PS4, why not Wii U?

[Nsanity]

S.T.A.G.E. said:

Nsanity said:

RenderMonk said:
The main differences between the PC version and PS4 version is the lighting and particle effects. Where an extremely top of the line PC (or custom rig for the demo) will be able to pump out a bit more in both the lighting and particle effects department, that's not a "Huge Difference." It's minor. The difference between PS4 and WiiU is the RAM, which is a crucial part in getting the lighting (like bloom, light scatter etc) and particle effects to run right and run smooth. This is more than likely than main reason why it's not ideal to run on WiiU. But the differences at the moment between PS4 and PC are negligible at best. And as the PS4 devs get better accustomed to the coding environment for PS4 it will keep up with most high-end PC's with, again, negligible differences.

There's a whole lot more: http://www.eurogamer.net/articles/digitalfoundry-unreal-engine-4-ps4-vs-pc

It says it underneath the comparison video that the lighting and effects are the only major difference. 

I'm not talking about the video and if you scrolled through the article you would have noticed the cut backs they had to make.