We use vehicles as our primary modes of tpt, as opposed to the infantry man whom relies on his feet to get him from point a to b. Other than that the other differences are, we avoid decisive engagement, where the infantries job is to close with and destroy the enemy. We guide/direct the battle, where the infantry physically wins it. He works for LCol as part of a battalion, we work for a Col or higher as a brigade asset. Best advice talk to members of both units and see what they do. Ask the recruiters to see a video. The QYR have a good one you can watch.