Data envelopment analysis has often been used to evaluate efficiency in the context of higher education institutions. Yet there are numerous alternative non-parametric measures of efficiency available. This paper compares efficiency scores obtained for institutions of higher education in England, 2013-14, using three different methods: the original Charnes et al. (1978) method and two slacks-based methods (SBM-Min and SBM-Max) developed by Tone (2001, 2015). The findings suggest that results are highly sensitive to methodology chosen. Hence caution is required in applying the results in any policy context.