Orange Pi is based on a much newer generation of SoC - A7 is newer than A8, and the Orange Pi is also quad core rather than single core and built on a more modern process node. They're not really direct competitors though since they have such different peripheral sets and intended uses - the C.H.I.P can be battery powered and has WiFi, whereas the Orange Pi is more suited to fixed/media applications thanks to its higher power usage, Ethernet, HDMI out, and better video decode hardware.