Globe Motor Durability Versus RS-545

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Just wondering what everyone's experience with Globe motors is, preferrable in comparision with the RS-545. Some old data says the Globe is a 55w motor versus what some say is a 100w RS-545. However the Globe may be extremely conservatively rated given it is intended for applications that required 10+ year life. It does not have even a slot for air cooling of its brushes but maybe its brushes are way bigger and more rugged than usual.
Anyone pushed these motors at 8amp, 12 amps or higher ? Burnt any out ?

My experience with the RS-545 is if you start running close to 100w continously (8+ amps), you should have a cooling fan pointed at the brushes and you probably shouldn't expect a motor (brush) life of too long. But then a complete regional might only put on 40 minutes total use on the motor.