What is the difference between \pnode and \psnode in the following example?

Question

\documentclass[border=10pt,pstricks]{standalone}
\usepackage{pst-node,amsmath}
\begin{document}
\begin{pspicture}[showgrid](-5,-5)(5,5)
\newcommand{\hinhtron}[4]{
    \pscircle(0,0){1}
    \psline(1;45)(1;-135)
    \psline(1;-45)(1;135)
    \rput(.5,0){#1}
    \rput(0,.5){#2}
    \rput(-.5,0){#3}
    \rput(0,-.5){#4}
}

\psnode(-2,0){A}{\hinhtron{0}{1}{0}{}}
\ncline[nodesep=1cm]{->}{A}{B}
\naput{9} \nbput{$x_1$}
\pnodes(-2,0){L}
\pnode([nodesep=1,angle=15]A){Q}
\psdot(Q)
\end{pspicture}
\end{document}

If the letter A is replaced by L, so:

Answer 1

\psnode(x,y){name}{text} is internally a \rnode{name}{text} and its coordinates depend to the internally used \rput(x,y){\rnode{name}{text}}. That could be the same as the given (x,y) but must not be the same! Important is the center of what is given by the text, that will be the node {name}.