Ultimately, with both the Xbox One and PS4 having such similar hardware, real-world performance differences will probably come down to how well the consoles make use of those eight CPU cores, GPU offloading, and differences in the memory subsystem. It’s also important to bear in mind that a huge speed-up is available when developing games for a fixed platform with known performance/latency characteristics. Realistically, we wouldn’t be surprised if games on the Xbox 720 and PS4, just like the current generation, look very similar. Likewise, games will probably look better on consoles for a few years, and then PCs will probably pull back ahead.
Ah non, c'est les mêmes.