With Yongnuo flashes, you can either have a battery pack input (565EX) or HSS (568EX) but not both, which is a drawback. I don't know if Yongnuo wanted two distinct models in their range or if it is a way of avoiding legal conflict with Canon for producing a flash that would be practically identical in both form and function to the 580 EX II if it had both battery input and HSS.
For triggers, you may also want to consider Yongnuo's YN-622 triggers which support all functions including E-TTL, HSS and ratios. They utilise the camera's flash menu, whereas the Odins have their own LCD controls which are probably quicker than using the camera menu. However, the YN-622s are a third of the Odin's price.
Edit: The 622s also allow a flash on-camera, where it operates as a Group A flash.