wii u is a more casual console, more likely to be bought by someone as a present for someone else (i.e. present at christmas from parent to child) where as xbone is more likely to be bought by the person who actually uses it. This is reflected by how Nintendo sales peak to a higher ratio at christmas compared to other consoles. Also wii u is much, much cheaper to manufacture. wii u will be the first to reach a budget price point which is often when huge sales of previous generation consoles have sold well.
I watched many Titanfall xbox one videos recently. Screen tearing, low frame rates and generally much weaker than even an entry level PC can achieve like AMD A8 6600k which is cheaper than xbone. The 360 version does get close to matching the xbone experience for gameplay. The xbone version only runs at 768p. It's horrible quite frankly. Even the ps4 hasn't really pushed hardware this generation but the xbone is frankly awful. Obviously still far more powerful than wii u but for me the xbox brand sells itself on powerful hardware, that was true of the original xbox and 360 but not xbox one. It's hard to justify buying a xbone when the ps4 exists.
For me the ps4 momentum will increase and take larger market share and the wii u will take a healthy niche at a lower price point. Xbone is already dead in mainland Europe. I mean utterly dead, most of the xbone sales in Europe currently are from the UK. If ps4 starts taking a significantly larger market share in the USA than xbone then xbone will be in a hugely dangerous area. We are talking a japanese situation for xbox one in mainland europe.
