The aim of this study was to investigate the evolution of competitiveness in elite women’s soccer, comparing the goal difference mean between the first FIFA Women’s World Cup (W1991) and FIFA Women’s World Cup 2011 (W2011), twenty years later. Analogous Men’s World Cups (M1990 and M2010) and the first one (M1930) were analyzed for comparative purposes. A total of 192 matches were taken into account and their final result was obtained through official match reports. The overall goal difference (GD) was 1.6, with GD of one occurring 44.3%. Percentage of matches finished with a GD of more than three was 30.7% in W1991 and only 6.3% in W2011. Mean of GD in W2011 was significantly lower than in W1991 (1.38 ± 1.10 vs. 2.81 ± 1.96, U = 226.0, z = -3.085, p = .002), while between M1990 and M2010 it did not differ statistically (1.21 ± 1.05 vs. 1.23 ± 1.23, U = 1639.5, z = -0.146, p = .884). In contrast to the comparisons to W1991, differences between W2011 and M2010 as well as M1990 were not significant. However, GD in W2011 was significantly lower than in the M1930. The results demonstrated that elite women’s soccer has shown a notorious development with regard to the competitiveness, approaching the status already achieved by men. This fast progress represents new challenges for the sports sciences and football associations.