I plan on transmitting roughly 10Mbps of CR1000 sensor data, as well as image files from a Logitech webcam. I was originally planning on using the RaspberryPi model B board, however, I would like control of power consumption, as to minimize it in times of low usage. This feature is not available with the RaspberryPi board, but is common with most Arduino's(say the mega 2560). I also plan on using a Wifi dongle to send and receive commands from a computer up to 50m away.
Since I need to be able to drive the camera and be able to send/receive commands and data, what are the trade offs between the RaspberryPi Model B and Arduino Mega 2560? One clear difference I was able to notice was that the Rpi has much more memory and processing power, will this drastically affect transmission speeds and throughput in my application?