Difference between the enstrophy and magnetic energy spectrum. Left: Illustrative plot of the enstrophy and magnetic energy power spectra normalised by their maximum values at different time (t₀, t₁, t₂)∼(0.02, 0.1, 1)t_end. For clarity, the spectra are shifted on the y-axis, and their corresponding deviation ε is shown. The results shown here are for a 2D MHD+TC simulation with ℳ = 1, δ = 100, n_s = 0.01 m⁻³. Right: Time profile of the difference ε for different Mach number ℳ, and density ratio δ = 100. The results shown here are for 2D MHD+TC simulations with n_s = 0.01 m⁻³, and a 3D MHD simulation (black dotted line) with ℳ = 1, δ = 30, n_s = 0.01 m⁻³.