Predictive Index measures behavioral drives. DISC measures communication style. Caliper measures general job fit. None of them measure competitive wiring — the competitive drive, economic motivation, and resilience under rejection that actually predict whether someone closes. SalesFit does. That's the difference.
From PI: Your managers are already trained, but PI never measured sales — SalesFit is plain English, no certification needed.
From DISC: Everyone understands DISC, but DISC never measured competitive wiring.
From Caliper: Caliper has decades of validation but it's general job fit, not sales-specific.
From Hogan: Hogan is the gold standard for executive personality but it's built for executives, not salespeople.