Never had the luxury of sex with someone with super long hair (longest haired person I've dated had hair nearly reaching waist), so cant relate to that.
However, as to your point of sex vs porn, I can relate a lot. For me, sex with someone I have weak or no strong feelings for has either felt exactly the same or even slightly worse than just jacking it to porn. However, sex with someone I love has been, long hair or not, incomparably superior to porn.