Resolution and PPI is generally more important to look at instead of physical size when it comes to productivity. If both sizes run at the same resolution then

Resolution and PPI is generally more important to look at instead of physical size when it comes to productivity. If both sizes run at the same resolution then the 13" is going to offer more PPI which will make things look tighter but the downside is things will be smaller. Personally I find 13" at 1080p to be pretty readable without needing to scale. There's no chance I would ever want to use less than 1080p for a development laptop. Don't be fooled by "retina" resolution numbers too. A lot of manufacturers will label their displays at a much higher resolution but when you run them at "retina enabled" resolutions they are either 1080p or less when it comes to screen real estate.