He has the size that they both lack.
This is one thing I really hope JD focuses on this off season. I think Zach would benefit from some bigger body recievers who can make contested catches. I think JD went into this offseason trying to secure those types of players (Davis, Cole), but because of injuries and lack of production we end up passing to mostly having 5'8 recievers which I think is detrimental to zachs skillset.
Burks size would be reminiscent of the reciever zach threw to at byu
I'm curious to see burks vertical. He seems more like an Anquan boldin then a Larry Fitz high flyer.