Left: radial and horizontal rms velocities as a function of the normalized radius for model ref (red line, calculated with set 1) and the same model (black crosses) calculated with set 2 at time t ≈ 90 days. Both curves are almost perfectly superimposed. Right: difference between both models in percent: , where v₁ corresponds to model ref and v₂ to the other one. The difference at r = 0 is about 0.1% and much less in the rest of the sphere.