The thicker the wire used in a spring, the shorter the lifespan. The better the material, the longer the lifespan. This is part of the rational behind the CGW spring.
As an aside, it's not the trigger return spring that generates the "force" of the reset, it's the tension of the trigger bar support spring. However, the stock TRS will generate a stronger return, but with either spring you can't outrun the reset with your finger.
Run the one you like best. Good to have choices.