\documentclass{standalone}
\usepackage{binarytree}

\begin{document}
\btreeset{%
  draw missing,%
  separate,%
  level distance scales=false,%
  sibling distance scales=false,%
  scale=0.5}

\def\arraystretch{1.5}
\begin{tabular}{cc}
  none scales & both scale \\
  \BinaryTree{}{3} &
  \BinaryTree[yscale=1.7,level distance scales,%
                        sibling distance scales]{}{3} \\
  level distance scales & sibling distance scales \\
  \BinaryTree[yscale=1.7,level distance scales]{r}{3} &
  \BinaryTree[sibling distance scales]{}{3}
\end{tabular}
\end{document}