difference between gigabyte mobos

http://www.gigabyte.com/products/product-page.aspx?pid=4364#sp
http://www.gigabyte.com/products/product-page.aspx?pid=4649#sp

Except from the I/O not much. The HD supports a HDMI output for a resolution of 1920 * 1080.
The HD is more up to date with current hardware. Atleast thats what i can get from their site. Don't know if timings might be different but i doubt it.

I'd get the HD for an APU and the other one with a dedicated GPU.