There is already a thread on exactly this comparison. Please use the search function.
As for the beam, the Quark is better, I don't know about runtime and OTF Lumen. The stated Quark Lumen are OTF, while Fenix claims emitter Lumen. Don't care too much about a difference in Lumen you won't even notice, the beam is more important!
The official statement from 4sevens is that there won't be a second run with XPG R5. There will be one for sure, the question is when! You must decide if you need a good light now or if you need a better one in a few months or a year...