Both versions come with custom Apple silicon — if we ignore the M2 chip, you get the same M3 chip in, for example, both the MacBook Air 13-inch (M3) as you do in the MacBook Pro 14-inch (M3). What sets these devices apart is the slightly better display in the Pro, a cooling system to prevent any thermal throttling as well as more ports (including HDMI). The MacBook Air is more than good enough for most people, and it's considerably lighter than the Pro versions. But you should consider the Pro if you have more to spend, want that extra functionality, and want to prevent any potential for performance dips if you're using the device intensively for prolonged periods. The Pro also comes with the option of M3 Pro and M3 Max chips — which offer more firepower for the most intensive workloads.