  Universality of various fermion formulations is well established in QCD-like
theories defined around the perturbative $g^2=0$ fixed point. These arguments
do not apply for conformal systems that exhibit an infrared fixed point at
non-vanishing $g^2$ coupling. We investigate the step scaling function for
systems with 10 or 12 fundamental flavors using domain wall fermions and
compare it to perturbative predictions. We test universality by contrasting our
findings to results published in the literature based on staggered fermions.
