\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}