I have thrown both a Z Hornet and a ESP FLX Drone. I like my Hornet a lot more than my Drone. The Hornet does a lot more than my Drone did. I think if you have both a Hornet and a Drone in your bag you'll have some overlap until your Hornet beats up.
But really, it's what flys and feels the best for you. I recommend just sticking with the Hornet. But if you feel like you need some more meat hook, go with the Z Drone. A lot of people I play with throw them and love them. It's really a matter of preference between the Hornet and Drone.