I am working on a machine to dispense paper coupons. It uses a 12 volt DC motor to dispense the coupons off a roll. I need the motor to stop quickly each time a coupon is dispensed so I am using a dynamic braking to stop the motor. The motor cycles on and off according to a signal from a 555 timer. A typical cycle would be run motor for 2 seconds - stop for 5 seconds. This machine could run continuously for hours. I have found two different ways to set up a circuit to brake the motor. One uses a relay and the other a pair of mosfets. They are shown on my sketch. I would like to eventually make these machines and sell them. I am wondering if there is a good reason to use one circuit over the other. There isn't much difference in cost between the two. Is one circuit more reliable than the other or are there perhaps other reasons to pick one over the other.