A comparison of the two strategies for selected snapshots of the lignin yield landscape is shown in Fig. . Here, acquisitions are labeled according to whether they are acquired for the lignin yield or β-O-4 content, and whether they are generated by the eLCB or pure exploration function. Corresponding snapshots for the β-O-4 content are shown in Fig. . For both CA and PA, the lignin yield eLCB acquisitions are primarily exploitative in nature and probe the region where P f ≥ 1500. Similarly, the β-O-4 eLCB acquisitions all occur in the vicinity of the P f ≈ 500 region with high β-O-4 content. As expected, the batch 2 and 4 landscapes reveal that the CA-generated surrogate model is more developed compared to its PA equivalent, since it utilizes more of the available data points.