\begin{table}%t2 
\caption{\label{comp_laba_tbl}The average differences of integrated photometric parameters derived 
with different membership criteria.}  
\par
%\centering
\par
\begin{tabular}{lccc} 
\hline \hline  
Data sets & $N$  & \mc{2}{c}{Difference in} \\ 
 &    & $I(M_V)$ & $I(B-V)_0$    \\ 
\hline  
COCD[pm,ph] $-$ COCD[ph]         &650  &$+0.88 \pm 0.02$ &$-0.12 \pm 0.01$\\ 
COCD[pm,ph] $-$ Lata et~al.      & 73  &$+0.45 \pm 0.10$ &$-0.05 \pm 0.03$\\ 
COCD[pm,ph] $-$ Battinelli et~al.& 96  &$+0.48 \pm 0.10$ &$-0.00 \pm 0.02$\\ 
COCD[   ph] $-$ Lata et~al.      & 73  &$-0.26 \pm 0.11$ &$+0.10 \pm 0.04$\\ 
COCD[   ph] $-$ Battinelli et~al.& 96  &$-0.28 \pm 0.12$ &$+0.12 \pm 0.03$\\ 
\hline 
\end{tabular}  
\end{table}