Medium frets? Medium Jumbo frets? What does it mean when they tell you the bass comes with medium or jumbo frets?
I found a couple of graphics online that explain the differences. Playability, of course, is your own personal thing, but these graphics will give you a good idea of what to expect.
The Carvin one was found on the Carvin website; the other was seen in several places, so I don't know who owns it.
Click on the pix to embiggen them. The bottom one can be clicked twice for full size.