This question is the question that aesthetic patients ask the most.
Zirconium:
It is very durable
Ideal for back teeth
Suitable for bridge construction
Emax:
The light transmittance is higher
It is more natural in front tooth aesthetics
Ideal for single coatings
Summary:
Back tooth = Zirconium
Front dental aesthetics = Emax
However, the most correct choice is planned according to the mouth structure and expectation.
Premium approach:
The goal is not the most expensive material, but the most accurate material.