Time evolution of the pebble-to-gas torque ratio, Γ_p/|Γ_g|, as a comparison of the fluid and superparticle approximations for the planet mass M_pl = 1.51 M_⊕. The Stokes numbers are St = 0.01 (top) and 0.785 (bottom). The planet potential felt by pebbles is smoothed using є = 1R_H. The dashed red curve corresponds to simulations obtained with the FARGO 3 D code (set MfaE1). For simulations obtained with the DENEB code (set MspE1,) we distinguish: the torque arising from the instantaneous distribution of superparticles (grey curve), the torque corresponding to the time-averaged superparticle distribution (green curve), and a constant fit of the instantaneous torque (blue line). The dotted vertical line is the approximate time it takes pebbles to radially drift across the horseshoe region of the planet.