The Madison adds a clock, a second round meter, and another knob on the front. The internals are pretty much the same. The Washington, Madison, Grant xl, Cobra 148, Cobra 2000 just to name a few are superb radio's. When properly tuned and not all modded up sound clean, are stable on SSB, and have superior receive.
The only thing they really need is an alignment and maybe extra channels and a clarifier unlock if you so desire. They are all very much low powered radio's. They get all jacked up when someone try's to make it a 40 watt radio, wideband them, or do super swing and audio mods. Uniden really made some nice stuff back then.