The advantage

I agree with Sheldor. It's like saying you have a better chance to hit the lottery if you play the same number each time, or if you don't play the same number each time. It doesn't actually impact your success rate because the lottery is like Random Targeting. (But something about our intuition has trouble with that.)

For each shot, Random Targeting picks a GF. What GF you went to in the past is not relevant - any GF you pick right now has an equal chance of getting hit.