  The NA61/SHINE experiment aims to discover the critical point of strongly
interacting matter and study properties of the onset of deconfinement. It also
performs precise hadron production measurements for the neutrino and cosmic
rays experiments. These goals are being achieved by measurements of hadron
production properties in nucleus-nucleus, proton-proton and proton/pion-nucleus
interactions as a function of collision energy and size of the colliding
nuclei. This contribution presents preliminary results from the NA61 ion
program on single-particle spectra and identified particle multiplicity
fluctuations in p+p interactions at the CERN SPS. Comparisons with results from
p+p and Pb+Pb collisions obtained by the NA49 experiment are shown.
