Differences in TTVs with the pure N-body case for (a) planet b and (b) planet c. Top panel: fixing the planetary fluid Love number and the dissipation to their reference values (see Table 1), the potential Love number k_2,p is varied between 1 and 50. Bottom panel: fixing the planetary Love number and the dissipation to their reference values, the potential Love number k_2f,p is varied between 1 and 50.