There are two main differences, both crucial for performing optimal hip thrusts.
Firstly, the Hip Thrust Elite allows the free movement of the barbell in two dimensions: up and down, and backward and forward. This capability is essential as it replicates the unique arc of motion described by any user. A correct hip thrust trajectory requires an arc of motion for the hips and the barbell, rather than a straight vertical line. The Smith machine, in contrast, only permits a straight vertical trajectory, which is unnatural. This limitation restricts the range of motion and negatively impacts the mechanics of the lumbar spine, pelvis, and hips.
Secondly, the stability offered by the Hip Thrust Elite is unparalleled. It features an angled footplate combined with an oversized angled bench that includes integrated shoulder pads. This setup provides the most stable hip thrust platform in the industry, completely eliminating ground reaction and friction forces. This stability allows users to maximize force output and muscle tension. Such a setup is not possible with a Smith machine, where hip thrusts are usually performed with a regular flat bench and feet on the floor.