Resemblances and differences in mechanisms of noise-induced resonance

Systems showing stochastic resonance (SR) or coherent resonance (CR) share some features, in particular, the nearly periodic character of the signal. We show that in spite of this resemblance the different underlying dynamics can be detected in experimental data by studying the histogram of the inter-spikes times and some statistical properties like two-time correlation functions. We discuss its possible relevance for climate modeling.