polyhydrogenated oils have an extra hydrogen atom, which makes the difference...kind of weird. Makes for a smooth spread, but not so good for the blood vessels
I use butter in baking, and I wish that someone would make a truly spreadable butter...I haven't found one yet.
As you say, everythiing in moderation...I don't eat butter by the stick for a snack, but dairy products that come from an animal and not a company chemistry lab are better for the body...