While the agreement between theory and simulation is generally
good at pitch-angleswell off 90◦, it is revealed that 90◦ degree
scattering is not equally well described either by QLT or by
SOQLT. Therefore, the agreement of the parallel mean free path
with simulations (cf. Tautz et al. 2008; Tautz & Lerche 2010)
has to be attributed to the fact that, at μ = 0, SOQLT overestimates
Dμμ, thereby compensating for values that are too low at
0.3 μ 0.