Strap™ has two OSCI™ transducers and Vest has eight. While Strap™'s two transducers works in stereo, Vest’s transducers can deliver a full location-specific haptic experience (See also: Full-surround Haptic Mode). In addition, Vest’s transducers are bigger and more powerful. 

Strap™'s frequency response is 5Hz -250Hz while Vest's frequency response is 10Hz - 180Hz.