Raspberry Pi 2 Model B:

• a lot of existing projects and help
• only 40 GPIO Pins
• extension-board available (http://www.gertbot.com/) for real-time tasks and controlling of actors and sensors (easy to use with existing libraries)
  • Price: Farnell £40.00
• • size: width:130mm, height:15mm, depth:80mm
  • weight: 0.25 kg

weight: 59g

size: heigth: 85 mm, width: 56 mm, depth: 17 mm

power consumption: http://raspi.tv/2015/raspberry-pi2-power-and-performance-measurement

Hardware:

• Prozessor: ARM710 with 900MHz
• RAM: 1024 MB

price:

Reichelt: 37,95 €

BeagleBone Black

In contrast to Raspberry Pi :

• better I/O capabilities with 7 channel 200kHz 12-bit ADC, 8 PWMs, 4 UARTs, quadrature encoder hardware
• don't have to buy additional components to connect up many more sensors and actuators
• large number of PWM channels on the Bones make them better for motors
• better real-time control with two 200MHz, 32-bit RISC programmable real-time units (PRUs)
• approximately 20 books available for texts, reference and projects

weight: 39.68 grams

size: heigth: 86 mm, width: 53 mm

power consumption: http://www.farnell.com/datasheets/1819364.pdf?COM=DesignCenter in section 6.1.7

Hardware:

• Processor: AM335x 1GHz ARM® Cortex-A8

• 512MB DDR3 RAM

• 4GB 8-bit eMMC on-board flash storage

• 3D graphics accelerator

• NEON floating-point accelerator

• 2x PRU 32-bit microcontrollers

Price:

Farnell element14: €46.16 (Price is before tax)

RS Components: £39.99