  We examine the current driven dynamics for vortices interacting with
conformal crystal pinning arrays and compare to the dynamics of vortices driven
over random pinning arrays. We find that the pinning is enhanced in the
conformal arrays over a wide range of fields, consistent with previous results
from flux gradient-driven simulations. At fields above this range, the
effectiveness of the pinning in the moving vortex state can be enhanced in the
random arrays compared to the conformal arrays, leading to crossing of the
velocity-force curves.
