The HummingBoard, previously known as Carrier One, is composed of a baseboard and SolidRun microSOM (micro System-on-Module) have comes with the followings specifications:

• SoC = Freescale i.MX6 Quad @ 1 GHz with Vivante GC2000 3D GPU. The microSoM also comes in solo and dual flavors, and although it’s likely the HummingBoard will be sold with these variants too, it’s not 100% confirmed
• System Memory – 2 GB RAM
• Storage – micro SD card slot, mSATA connector, and optional eSATA (shared with USB?)
• Video output – HDMI, and LVDS
• Audio I/O – HDMI, 3.5mm stereo jack, and Coax S/PDIF output
• Connectivity – Gigabit Ethernet + Wi-Fi and Bluetooth module (BCM4329)
• USB – 2x USB 2.0 ports, 1x micro USB for power
• Expansions
  • Raspberry Pi compatible headers (26-pin P1 header only), Camera connector (CSI), LCD connector (DSI)
  • 8-pin header for FlexCAN
  • mini PCIe connector
• Misc – RTC, IR receiver, LEDs
• Dimensions – Not explicitly specific, but they should be the same as the Raspberry Pi.

Hummingboard's COM module

The microSOM features i.MX 6Q SoC, 2GB RAM, Gigabit Ethernet PHY and BCM4329 Wi-Fi + BT module, and there may be different microSOM configurations, so these may end up being optional. You’ll lose one feature from the Raspberry Pi: composite video output, which has been replaced with coaxial S/PDIF. All other hardware features appear to be present with faster hardware. You’ll gain a much faster CPU, 2GB RAM, Gigabit Ethernet, Wi-Fi and Bluetooth,SPDIF, an IR receiver, and a RTC. As with the Banana Pi, not all Raspberry Pi accessories, such as the camera, will work out of the box, as there’s some serious work to make them compatible. But enclosures should be re-usable, and most boards that simply connect via the 26-pin connector should work with just a little bit of work.

Tough it is hard to grasp why they didn't improve the most irritating things of the Raspberry Pi, the layout of the connectors... Even worse, they did a 1 on 1 copy of the madness. Banana Pi probably is the winner of the Pi clones for now.