[en] This paper describes a comparative study of two Uncertainty Quantification (UQ) techniques for reactor neutronics analysis. Adjoint- and sampling-based uncertainty quantification approaches are applied to a simplified model of a sodium-cooled fast reactor to evaluate uncertainty in four integral parameters (void reactivity, Doppler reactivity, K_eff, and control rod reactivity). Results obtained with the two UQ methodologies are compared and discussed. This preliminary work, performed in a well-studied field like neutronics, will inform sensitivity and uncertainty method selection for future calculations in other disciplines like coupled neutronics/thermo-hydraulics. (authors)