  We compare and contrast the emission of gravitational waves and waveforms for
the recently established "helicoidal-drifting-sequence" of a test particle
around a Kerr black hole with the publicly available waveform templates of
numerical-relativity. The merger of two black holes of comparable mass are
considered. We outline a final smooth merging of the test particle into the
final Kerr black hole. We find a surprising and unexpected agreement between
the two treatments if we adopt, for the mass of the particle and the Kerr black
hole a Newtonian-center-of-mass description, and for the Kerr black hole spin
an effective value whose nature remains to be clarified.
