What's the difference between a soft-close and a slow-close toilet seat?

They describe the same idea: a hinge mechanism that catches the lid and seat so they lower gently instead of slamming. Brands market it under different names (Kohler uses 'Quiet-Close' and 'Slow Close', others say 'soft close' or 'no slam'), but the practical benefit is the same quieter, gentler closing action that reduces wear and noise.