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The Super-Kamiokande (SK) and the Sudbury Neutrino Observatory (SNO)experiments are monitoring the flux of B solar neutrinos through the electronenergy spectrum from the reactions nu_{e,mu,tau} + e --> nu_{e,mu,tau} + e andnu_e + d --> p + p + e, respectively. We show that the SK detector response toB neutrinos in each bin of the electron energy spectrum (above 8 MeV) can beapproximated, with good accuracy, by the SNO detector response in anappropriate electron energy range (above 5.1 MeV). For instance, the SKresponse in the bin [10,10.5] MeV is reproduced (``equalized'') within 2percent by the SNO response in the range [7.1,11.75] MeV. As a consequence, inthe presence of active neutrino oscillations, the SK and SNO event rates in thecorresponding energy ranges turn out to be linearly related, for any functionalform of the oscillation probability. Such equalization is not spoiled by thepossible contribution of hep neutrinos (within current phenomenologicallimits). In perspective, when the SK and the SNO spectra will both be measuredwith high accuracy, the SK-SNO equalization can be used to determine theabsolute B neutrino flux, and to cross-check the (non)observation of spectraldeviations in SK and SNO. At present, as an exercise, we use the equalizationto ``predict'' the SNO energy spectrum, on the basis of the current SK data.Finally, we briefly discuss some modifications or limitations of our results inthe case of sterile neutrino oscillations and of relatively large Earth mattereffects.Comment: 18 pages + 6 figure

Solar neutrino event spectra: Tuning SNO to equalize Super-Kamiokande