Is skim milk in high fiber cereals really much better than 2%?

well im trying to add high fiber cereals to my diet to lose some weight, like the go leans and raisin brans and stuff and was wondering they recommend you have it with skim milk, i know its better for you but is it really alot better for you are just like a little bit better, like if im trying to lose weight will it go alot faster with skim milk then 2% or is it really not that big of difference