In Jet Set Radio there are three types of graffiti commands: Beat type, Gum type, and Corn type. This allows the graffiti to be used for more than just paint such as taking down the police or disabling electronics. These are only visible to select people, mostly Rudies. In the story of Jet Set Radio Future, graffiti isn't just regular spray paint, but the 'Soul of the Streets'. This most likely done to compensate for the huge pieces of graffiti that are available to be tagged throughout the game. Similar to how the small tag was sprayed in Jet Set Radio, all tags in Jet Set Radio Future are sprayed with a button, the right trigger. In Jet Set Radio Future, tagging was heavily simplified. This also applies to the Game Boy Advance version of the game.
If the player passes a small graffiti spot, they will quickly spray the tag and move on. In Jet Set Radio, tagging requires input from the players when at large and extra-large graffiti spots.