MacroMind matchup data — real ranked games, not opinions
Cho'Gath vs Vel'Koz
In Middle, Cho'Gath wins 53% against Vel'Koz across 49 observed ranked games. This is an observed win rate shown with its sample size, not a prediction or a guaranteed counter.
By 15 minutes the median game has Cho'Gath behind by 248 gold.