Comparison of charged-particle pseudorapidity density measured in 0$-$80% and 0$-$5% Pb$-$Pb collisions over $|\eta|< 1$ with similar measurements from the CMS experiment in $|\eta|< 2.6$. For ALICE data, grey and open boxes show the uncorrelated and correlated systematic uncertainties over pseudorapidity, respectively. Statistical uncertainties are smaller than the marker size. For CMS data, the vertical line denotes the total systematic uncertainties.