Not too much of a difference.
According to a Senior developer at Ubisoft the Xbox 720 ‘similar to PS4’ .
Yannis Mallat has stated that Microsoft’s next-generation console will be ‘aligned with what Sony announced’, which means that the console will have similar features. He also told Eurogamer: It’s going to be connected. It’s going to be social. It’s going to be immersive. It’s going to be interactive.”
Rumors have been floating around for a while that Kinect will be a mandatory part of the system’s hardware and capabilities. Xbox 720 will be featuring a new controller and might even have a TV Tuner that would be sold based on a subscription model. Hopefully the Xbox will be revealed on April 26th according to previous rumors.
The PS4 is a system that mainly focuses on social experiences, instant-play model and will be released sometime Holiday 2013. Right now Sony has most of the next-generation hype under their belt and Microsoft needs to reveal their system as soon as possible.