We present a systematic benchmark of AlphaFold2, ESMFold, and OmegaFold on 1,327 protein chains deposited in the PDB between July 2022 and July 2024, ensuring no overlap with the training data of any tool. As expected, AlphaFold2 achieves the highest median TM-score (0.96) and lowest median RMSD (1.30 Å), outperforming ESMFold (TM-score 0.95, RMSD 1.74 Å) and OmegaFold (TM-score 0.93, RMSD 1.98 Å). Crucially, however, many cases exist in which the performance gap among these methods is negligible, suggesting that the faster, alignment-free predictors can be sufficient. We identify the sequence, length, structural family, and experimental context features that drive substantial discrepancies in accuracy, and—leveraging ProtBert embeddings and per-residue confidence scores—train LightGBM classifiers that accurately predict when AlphaFold2’s added investment is warranted. Our framework thus provides actionable guidance for practitioners deciding between speed and precision in large-scale structural pipelines.