Distribution of the metallicity gradients calculated for the simulated systems of both the DCJL and MARVEL sets as a function of their stellar mass colour-coded according to their t₉₀ (top left) and t₅₀ (top right), and as a function of t₉₀ (bottom left) and t₅₀ (bottom right) in both cases colour-coded according to their stellar mass. We also show the gradient values for the LG dwarf galaxies presented in this work, shown as grey circles with their associated error bars. We have assumed a stellar mass-to-light ratio of one in this case.