The integrated particle ratios for $\pt > 10 \gevc$ in pp and $\pbpb$ collisions as a function of the number of participants. Left panel: the kaon-to-pion ratio. Right panel: the proton-to-pion ratio scaled by a factor of 3 for clarity. Statistical and PID systematic uncertainties are plotted as vertical error bars and boxes around the points, respectively. Note that this kaon-to-pion (proton-to-pion) ``high-$\pt$'' ratio is ${\approx}4$ (${\approx}2$) times larger than the bulk ratio.