Powder bindings and freeride bindings overlap a lot, but they have a different feel. Freeride bindings are built stiff and responsive for charging steep, technical lines at speed. Powder bindings lean into a surfier, more playful feel—they often have softer torsional flex that lets you lean into turns and slash through deep snow more naturally, similar to surfing a wave.
Powder bindings also tend to support setback stance positions, which shifts your weight back on the board to keep the nose up in deep snow. If you live somewhere with frequent storm cycles and have a dedicated powder board, powder-specific bindings complete that setup nicely.
If you only see deep snow occasionally, freeride or even all-mountain bindings will handle powder just fine—you don't need a niche setup for a few storm days a year. Save powder bindings for when fresh tracks are a regular part of your season, not a rare treat.