  Recent work on improved efficiency of calculations for extreme mass ratio
inspirals has produced the useful byproduct of comparisons of inspirals of
comparable mass by particle perturbation (PP) methods and by numerical
relativty (NR). Here we point out: (1) In choosing the rescaling of the masses,
consideration must be given to the differences in the PP and NR methods even in
the earliest, least nonlinear regime; in particular barycenter effects must be
addressed. (2) Care must be given to the comparison of the nonspinning remnant
in PP and the rapidly spinning remnant in NR.
