What's the difference between a commuter, folding, and fat-tire e-bike here?

Commuter e-bikes (like the Gotrax Dolphin and Heybike Cityscape) prioritize comfortable upright city riding and step-through frames. Folding models (Gotrax R1) trade wheel size for portability and apartment/car storage. Fat-tire and moped-style bikes (TST, Jasion RetroVolt) emphasize power, off-road grip, and higher top speeds but are heavier and harder to pedal unassisted.