hogdogs makes some great points about position of controls. I prefer the 870 because I am left handed and it feels like it was made for left handed shooters to me. Mossberg makes a fine product that many prefer to the 870 (heard many arguements over which is best) Bottom line handle both and if you can shoot both and you will know which you prefer. Be sure to post a photo of your new 870 when you get it lol
Just curious, but why would the 870 feel like it was made for left handers? I would think the safety on the 870 would be awkward for left handers. Usually a left hander would feel more comfortable with the Mossberg's safety.