  We argue that the theories of Volokitin and Persson [Comment
arXiv:1405:2525], of Dedkov and Kyasov [J. Phys.: Condens. Matter 20 (2008)
354006], and Pieplow and Henkel [New J. Phys. 15 (2013) 023027] agree on the
electromagnetic force on a small, polarizable particle that is moving parallel
to a planar, macroscopic body, as far as the contribution of evanescent waves
is concerned. The apparent differences are discussed in detail and explained by
choices of units and integral transformations. We point out in particular the
role of Lorentz contraction in the procedure used by Volokitin and Persson,
where a macroscopic body is "diluted" to get the force on a small particle.
Differences that appear in the contribution of propagating photons are briefly
mentioned.
