I lived with an ESFJ, was in a very intense close relationship with him for five years, so I can tell you that ESFJs nurture people in very practical, immediate ways. He would say things like "Are you comfortable sitting there? It's softer here" and "You've been drinking caffeine all day, you need to drink more water" and he would bring me a glass of water without me asking for it or agreeing to drink it. If we were sick, he would wash the bedding EVERY DAY we were sick in order "to kill the germs." I would wake up sometimes and he would be cleaning the house. I came home from work one night and he was scrubbing the bathroom. These were common occurances.
He was also very particular about eating foods he was familiar with and kind of afraid to try new foods, I would have to prompt him to do so. In order to make him happy, I would bring him things that I absolutely knew he liked, like candy he'd been eating since he was a kid.
Speaking of being a kid, he starting collecting horror films in his childhood, kept them listed and organized, and knew lots of details about the directors and genres.
HOWEVER he was not at all interested in any sort of deep analysis about the films. He cared about emotional impact, usage of color, and atmosphere rather than "message" or "meaning" usually. He sometimes told me I was overly analytical. He's a very intelligent ESFJ, too, very quick and witty and had very sophisticated taste in music and film, is kind of snobby about his films, too. He just doesn't give a rats ass about theory, and it kind of annoys him.
My ENFJ sister, on the other hand, loves to analyze the problems of the world and psychoanalyze the people around her. She thinks about people in other countries and is very "politically correct." She really goes far with it, avoiding the cartoon Family Guy because she believes there are bad underlying messages in it 0_o. My ENFJ sister is every bit as "others centered" and nurturing as an ESFJ, but it's in a more ... analytical way, and not always as practical. In fact, sometimes she can neglect practical things to the point of it seeming inconsiderate. But she's extremely supportive and considers herself kind of the "family referree" who wants everyone to get along.
I know these are only two examples, but I hope this helps make the distinction clearer.