Strong 25 mm diameter 6 volt geared motor for small robot

Hi,
I am looking for a 25mm diameter 6 volt geared motor for a project I am doing. I have tried the Pololu 25mm 6volt 75 to 1 geared motor and the gears keep failing. I this motor better, stronger?
12V, 26RPM 583oz-in Precision Planetary Gearmotor

Product Code : RB-Sct-617

robotshop.com/en/12v-26rpm-5 … motor.html
RB-Sct-617 can provide up to 583oz-in at stall, so around 145oz-in continuously.

robotshop.com/en/pololu-6v-7 … coder.html

RB-Pol-357 (if that is what you have) can provide up to 85oz-in at stall, or 21oz-in continuously.

RB-Sct-617 can provide around 7 times more torque.