The difference between a chopper and a chopping tool is a chopper is a tool such as a stone tool that has a cutting edge that is flaked from one side.
A chopping tool has edges that are flaked from both sides.
So essentially a chopping tool is a more refined version of a chopper and is made by working both sides of a stone.
The characteristic tools of the Chopper chopping-tool industry were essentially the chopper, that had a single straight or curved cutting edge flaked from a pebble or from a chunk of stone; the chopping tool, with a bifacial cutting edge flaked, again, from a pebble or chunk of stone; and the hand adze, shaped from a block of stone.
The chopper tool was used for hacking, cutting, and chopping, choppers allowed early peoples to sever soft materials, especially meat and wood.
One of the main uses of choppers was to cut through the meat and skins of hunted animals to obtain food, hide, and fur.
The sharpness of the tool improved the overall process.