For "normal" usage (internet sharing), the "Speedbooster" feature is more worthless marketing than anything. You need a similarly-compatible (and non-standard) device to actual utilize that feature. However, the "GS" (Speedbooster) models, also have twice the RAM and flash ROM space internally, so if you are ever planning on using the Sveasoft or other 3rd-party firmwares in the future, the "GS" model will offer you more future expansion possibilities.