Orbital architectures of the 48 multi-planet systems in our sample with measurement uncertainties smaller than σ_M ∕M = 50% and σ_R ∕R = 16%, and that of the inner Solar System. In the left panel the colors of the points represent the logarithm of the radius of a planet divided by the radius of the previous one, and the systems are ordered by similarity in radius (defined in Sect. 2.2). In the right panel the same is represented, but for the mass. The circle size is proportional to the radius of the planet.