Series of papers discuss on the basis of phenomenological arguments whether the high frequency quasiperiodic oscillations (kHz QPOs) observed in the neutron-star and black-hole X-ray sources originate in the same physical mechanism. Recently it was suggested that a general trend seen in neutron star kHz QPOs rather exclude such a uniform origin. On the example of the atoll source 4U 1636-53 we illustrate that this is not neccesarily true.