The differences between Nike product numbers AJ and AR are as follows:

1. The names are different. AJ's full name is air jordan. It is a series created by NIKE after it signed Jordan. It is one of Nike's high-end brands.

2. The two signs are different. NIKE's trademark logo is a small hook, while AJ's logo is a human figure playing basketball.

3. Different technologies are used. The AJ shoe body adopts one-time molding technology, which has a relatively high cost and a relatively high selling price. It is a high-end series of NIKE.

4. The production products are different. Nike produces a wide range of sporting goods, such as clothing, footwear, sports equipment, etc., while AJ mainly focuses on footwear.

5. The design is different. The AIR JORDAN outsole uses solid traction and exceptional flexibility with grooves designed to mimic the natural movement of the human foot. The proprietary weave technology developed by Jordan Brand is no different than standard carbon fiber, but its size and shape are. It provides just the right amount of stiffness while still allowing the foot to flex naturally.