The executive search industry frames the decision as boutique vs. large. Specialized vs. global. Hands-on vs. infrastructure. And it's the wrong question. After twenty years placing C-suite leaders across U.S. and Mexico markets, the variable that predicts search success isn't firm size. It's diagnostic depth. Whether someone reads the conditions before running names. When leadership hires fail, the postmortem rarely blames the firm's size. It reveals that nobody mapped the founder's operating reality, the board's actual authority, or the decision boundaries the new leader inherited. Those are conditions problems, not candidate problems. Both models produce good outcomes. Both produce failures. The difference is what happens before the first candidate is sourced. The question isn't "boutique or big?" It's: does this partner understand the conditions my next leader will face?