1. Dynamic Performance (Switching Losses): The gate charge (Qg = 45 nC) of the TK17E65W is 55% higher than that of the STP25N60M2-EP (29 nC), and its input capacitance (Ciss) is also notably larger. At the same switching frequency, the TK17E65W will exhibit significantly higher gate drive losses and switching losses. This results in reduced efficiency, increased temperature rise, and imposes greater demand on the drive current capability. 2. Threshold Voltage (Vgs(th)): The TK17E65W has a lower threshold voltage (3.5 V) compared to the higher threshold of the STP25N60M2-EP (4.75 V). This makes the TK17E65W easier to turn on under low-voltage drive conditions, but it also renders it more susceptible to noise and increases the risk of spurious turn-on in environments with high dv/dt. 3. Different Current Rating Basis: The drain current (Id) rating for the STP25N60M2-EP is specified relative to case temperature (Tc), whereas the TK17E65W's rating is based on ambient temperature (Ta). In practical applications under identical thermal conditions, the current-carrying capability of the STP25N60M2-EP is generally more reliable and superior.