Regional climate models (RCMs) may not always provide more accurate climate simulations than lower-resolution general circulation models (GCMs). A study compared RCMs and GCMs at different resolutions and found that while RCMs showed some improvements in simulating past climate conditions, they did not outperform GCMs in representing climate changes. The results suggest that the accuracy of RCMs is influenced by the input from lower-resolution GCMs, challenging the idea that RCMs always offer better climate representations.