It depends, do you plan on playing tournaments or just playing some rec ball? How often do you play?
If you are a serious tournament player, i would say to go with the axe. Empire is a great company and they make great guns. The axe is really nice and can be upgraded into one hell of a marker. It is also a full metal marker, so it feels much nicer in the hands.
If your just a rec player who plays once a week like me, then i would say to go with the extcy. The extcy has some fancy features such as the on/off asa, eyes, a board that is capable of more than enough bps that is loaded with different modes. It has some other good features such as the bolt out back, interchangeable body kits, a good reg, and a nice barrel.
It really comes down to how much money your willing to pay. Personally, if it were me, i would go with the extcy only because i prefer to buy my guns brand new, rather than used. But if you don't mind buying a used gun, and you have the money, go for the axe.