FZ09 vs 2013 ZX6R : what should I expect

So I have been afforded the opportunity to purchase a second bike...is there any reason to keep my 13 ZX6R after getting a new FZ09? I know the FZ is way more comfortable, has a lot more usable power and is just a blast to ride. I don't want to sell my ZX unless I have to but there is no use in having two bikes which perform in a similar manner. Id rather have a bike that does it all.