If it gets a lot of use in the field, the stainless would be a better choice. Conversely if you use it once or twice a year, and leave it in the safe untouched the rest of the year, it will be less likely to rust if it's stainless. Blued or stainless will rust, it's just that stainless is more forgiving of neglect.
The mini 14 I've got coming from Sportsmans Warehouse (hopefully) is the stainless model. :1zhelp:With 15 year old grandson as the primary user and abuser, I thought stainless would be a lot more forgiving to less than top notch care than blued. Blued however does provide a more classic look.
I like the deep dark look of blued barrels when the stocks are wooden. I prefer stainless for practical reasons.......but the blued ones look better (until you pull one out of the safe with a rusty fingerprint on it because somebody had sweaty hands when they last put it up).
I've got several stainless guns and like them a lot. I usually clean after each shooting, but in the case of my Mini 14, if I don't have time to clean right then or even for a few months, I don't sweat it. Its still good to go when I need it and I can clean it when I get around to it.
I have both but I tend to use my stainless rifles more just because the upkeep is less. Lets face it, I don't want to put a scratch into the perfect blueing of my 1952 30/30 Winchester yet a scratch from hunting in my 700 Stainless BDL is not even going to show. Some guns are for the range and others are for use. Stainless is for use.