Depletion factor, [Y/Fe], versus metal column density, logN(H I) + [X/H], for the GRB-DLAs in our sample and the QSO-DLAs from Noterdaeme et al. (2008, 2015a; N15). Also shown are the two QSO-ESDLAs from Balashev et al. (2017; B17) and Ranjan et al. (2018; B18). When molecular hydrogen is detected, the data points are colored (GRB-DLAs in red, QSO-DLAs in green and blue, as labeled). The symbol size represents the overall molecular fraction log f, and in case of a non-detection the corresponding upper limit. The GRB-DLAs at z > 4 are additionally marked with a cross. The solid and dashed lines indicate the best-fit linear model and corresponding 3σ errors. Above and to the right of the scatter plot, we also show the histograms for our GRB-DLAs and the N08 QSO-DLA sample. Again, systems with H₂ detections are colored as labeled. Upper limits are not included in the histograms.