Be advised that Orange Pi have many different boards with similar names, but vastly different specs. The $6.99 model is for 256MB RAM and a Allwinner H2 chipset.
Also a lot of the boards can only be powered by a DC jack, not the onboard MicroUSB.
Yes, the Raspberry Pi models are a little confusing, especially with the '+' versions and PCB-revisions. But I don't think the purpose of the parent comment was to say that it was worse than others, more of a heads-up to someone looking to order a model to take a second look and verify the specifications.
Also a lot of the boards can only be powered by a DC jack, not the onboard MicroUSB.