The Mephisto II is a better sounding CD player, especially with the drawer open. The benefit of the 390S is the ability to bypass the volume control.
I am a dealer for Audiomeca and have spent quite a bit of time with both players. I would save the 4 hours and not bother. As far as build quality, the Mephisto is a beautiful player, but not quite the build quality of the Levinson. Levinson equipment is always exceptional in that regard.