Tektro Novela MD-M311 mechanical disc brake replacement
You are going about this incorrectly. Although some brakes are more prone to squealing than others, replacement is expensive and rarely needed. Brake squeal is a function of the brake, frame, rotor and wheel interaction, so there is still no certainty a new brake will fix the problem.  

I won't go into details as solution to squealing brakes is well covered elsewhere, however things to try are 


Bed brake properly
Align Calipers
Clean contaminated rotors and pads
Organic rather than metallic pads 
New disc rotors


As mentioned already - if a new bike take it back to the shop and ask them to look at it.