Note that the schematic for the Raspberry Pi 2 Model B has not been released so we are unable to confirm if there are any changes to the specific signals used on the display and camera connectors. Changes Compared to Raspberry Pi 1 The Raspberry Pi 2 uses a new processor model so some pin additional […]

https://www.raspberrypi.org/documentation/hardware/raspberrypi/schematics/README.md  

The Raspberry Pi 2 has an identical form factor to the previous RPi 1 Model B+. The PCB measures 85mm x 56.2mm excluding overhanging connectors and is 20.8mm high. Official CAD https://www.raspberrypi.org/documentation/hardware/raspberrypi/mechanical/README.md

Official Raspberry Pi Page www.raspberrypi.org/products/raspberry-pi-2-model-b/ Core Differences To The Raspberry Pi 1 ARM V7 instead of ARM V6 processor architecture.  (This opens it up to operating systems like Ubuntu, robot operating system, Windows 10, etc). Quad core instead of single core processor.  For the operating system and multi threaded applications this provides a massive speed […]