What if the difference between tubes and solid state had nothing to so with the type of distortion each creates but rather with the wire used inside of the devices?
Let's look at the devices used in preamplifiers for now and compare the wire sizes inside the two most common devices found in each type (tube and SS). Below is an image showing the difference in the physical sizes of two commonly used devices.
Solid state preamplifiers that use discrete devices (not integrated circuits) typically use a physical package series called the TO-92 case. Tube preamplifiers used a physical package series called the 9-pin miniature. Let's see what the difference in internal wire sizes is between the two.