Eurogamer’s Digital Foundry series goes in-depth into the technical aspect of gaming, where they analyze the technology behind the games, the consoles, etc. They’ve already analyzed the Wii U plenty of times — for example, they originally found out that the Wii U GamePad latency was actually faster than the standard HDTV.
This time, they take a look at one of Wii U’s launch games: Ninja Gaiden 3: Razors Edge, and compare it to the PlayStation 3 and Xbox 360 versions. You check out the complete analysis here, and the videos below. As they conclude (and as the videos show), the difference between the three platforms is minimal. Of course, gameplay wise, the Wii U edition has full Gamepad support, plus lots of gameplay tweaks, the inclusion of extra content and so on. This obviously makes the Wii U version the superior one, all technical stuff aside.