\documentclass{article}
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\begin{document}
	some text

% endfloat requires \begin and \end commands at start of line
\begin{table}
  	\caption{My caption}
	\begin{tabular}{c}
		data
	\end{tabular}
	\DIFaddbeginFL 

	\DIFaddFL{some comment for under the table
	}

\DIFaddendFL 
\end{table}

% endfloat requires \begin and \end commands at start of line
\begin{figure}
	\centering
	My figure
  	\caption{My caption}
	\DIFaddbeginFL \label{fig}

\DIFaddendFL 
\end{figure}

some more text
\end{document}
