The difference between aluminum thermal break and non-thermal break profile windows lies in insulation performance, energy efficiency, and comfort. 

The aluminum thermal break profile window  is a section of low-conductivity material (usually polyamide or polyurethane) inserted between the inner and outer aluminum frames. Which can improve thermal insulation, have better energy effeciency, can reduce condensation, more quieter and higher cost. 

The aluminum non-thermal break profile Made of a single aluminum extrusion—no insulation barrier between interior and exterior surfaces. Which is high heat conductivity, lower cost, Less energy effecient, prone to condensation but more economical for people to use.