I'm currently invested in two YN622C transceivers and a YN622C-TX and have a YN468EX-II speedlight to work with them. I will be buying another flash shortly and I'm looking at the two flashes mentioned in the title. My understanding is that both work the same with the 622C trigger system. Currently it looks like the YN600EX is $20 higher than the 568EXII and besides the radio aspect of it the 600EX also has an auxiliary power port. I don't anticipate moving to the full 600EX system anytime soon.
So, I'm thinking the best option is to spend the additional $20 and go with the 600EX...a pinch of more power(?), auxiliary power option, and the possibility to move to an integrated radio system later on if I so desire.
Any reason, considering my current equipment inventory, that I shouldn't go ahead with the YN600EX-RT?
EDITED: I messed up and called the 622C pieces "600C" pieces...have noted the edit in RED.