Histograms showing the contribution of colliding stars to VMS formation, divided into binary, hyperbolic, and total collisions. The mass ranges are < 0.1 M_⊙, 0.1-1 M_⊙, 1-10 M_⊙, 10-100 M_⊙, and > 100 M_⊙. Results are shown for the N-body simulation (left column) and the MOCCA simulation (right column). The top panel displays the number of collisions, and the bottom panel shows the cumulative mass contributed by these collisions.