The Goal: You built a home office in a detached garage 30m away from your main house. Inside the garage, you need to connect a smart TV, a desktop computer, a printer, and your phone.
The Winner: Point-to-Point Kit.
Why: If you use an Outdoor AP on the main house, the signal will struggle to penetrate the garage's exterior walls and insulation, giving you weak Wi-Fi inside. By using a PtP kit, you shoot the internet cleanly across the garden, bring the wire inside the garage, and plug it into a small indoor router or access point. Now, the garage has its own perfect, full-strength Wi-Fi.
The Goal: You want to stream music outside, browse social media, and install a couple of wireless smart security cameras outside.
The Winner: Outdoor Access Point.
Why: You have no "target" building to beam internet to; you just need a blanket of Wi-Fi across an open space. Mounting a single Outdoor AP on the back of your house will flood the entire patio area with a signal that all your moving devices can easily connect to.
The Goal: You have a livestock shed 200m away. You want to install four wired IP security cameras inside and outside the barn to keep an eye on things from your house.
The Winner: Point-to-Point Kit.
Why: 200m is way too far for a standard outdoor Wi-Fi access point to reach reliably. A PtP kit will bridge that 200m gap effortlessly. Once the signal reaches the shed's receiver, you plug it into a network switch, plug all four cameras into that switch, and they will stream video to your house/phone with zero lag.
Sometimes, you actually need to use them together.
If you have a detached garage (Use Case 1) but you also want Wi-Fi in the garden between the house and the garage, you would use a PtP kit to link the two buildings, and then plug an Outdoor Access Point into the garage unit to give wi-fi in the garden.