Edit: nvm, looks like the Air supports two external displays but the Pro only supports one.
- MacBook Pro with M3 Pro chip = two external displays
- MacBook Pro with M3 Max chip = four external displays
Given that I would personally go for the M3 Pro with 18GB memory, but it depends on your needs of course.
Edit: nvm, looks like the Air supports two external displays but the Pro only supports one.