\usepackage{booktabs}
\usepackage{makecell}
...
\begin{table}
\begin{minipage}{.45\linewidth}
\centering
\caption{Table 1}
\begin{tabular}{*{3}{c}}
\toprule
\makecell{id} & \makecell{seq} & \makecell{feature} \\
\midrule
Cell 1 & Cell 2 & Cell 3 \\
Cell 4 & Cell 5 & Cell 6 \\
\bottomrule
\end{tabular}
\end{minipage}
\begin{minipage}{.45\linewidth}
\centering
\caption{Table 2}
\begin{tabular}{*{3}{c}}
\toprule
\makecell{id} & \makecell{seq} & \makecell{feature} \\
\midrule
Cell 1 & Cell 2 & Cell 3 \\
Cell 4 & Cell 5 & Cell 6 \\
\bottomrule
\end{tabular}
\end{minipage}
\end{table}