\begin{table}[!htb]
\centering
\caption{Model architectures parameters.}
\resizebox{\textwidth}{!}{%
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{\renewcommand{\arraystretch}{2}
\begin{tabular}{ccccccccccc}
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\textbf{Model} &           & \textbf{\begin{tabular}[c]{@{}c@{}}Parameter \\ Count (millions)\end{tabular}} & \textbf{} & \textbf{Physics Model}               &  & \textbf{\begin{tabular}[c]{@{}c@{}}Training\\ Iterations (k)\end{tabular}} & \textbf{} & \textbf{\begin{tabular}[c]{@{}c@{}}Learning Rate\\ Reduction Schedule\end{tabular}} &  & \textbf{\begin{tabular}[c]{@{}c@{}}Inference Time (s)\\ per volume\end{tabular}} \\ \cline{1-1} \cline{3-3} \cline{5-5} \cline{7-7} \cline{9-9} \cline{11-11} 
vSHARP         &           & 95                                                                             &           & ADMM                                 &  & 700                                                                        &           & 150k                                                                                &  & 17.7                                                                             \\
U-Net          &           & 33                                                                             &           & -                                    &  & 375                                                                        &           & 75k                                                                                 &  & 13.1                                                                             \\
E2EVarNet      & \textbf{} & 13.5                                                                           &           & Gradient Descent in $k$-space Domain &  & 250                                                                        &           & 50k                                                                                 &  & 13.9                                                                             \\ \hline
\end{tabular}%
}
}
\label{tab:S2}
\end{table}