I have used both and have given up on the gravity if there is any coons in the area. I can't afford the corn they will go through and I have never seen them at the feeder in daylight hours. I do have lots of pictures w/ up to 7 coons in one picture-all at night. You also have to be sure you keep feed in you slingers as the coons will tear them apart when they run out. The more I think about it, I believe I will set some traps this year and try to rid the country of some of these little thieves.