I assume you are speaking of the Romantic ROAD ...Augsburg has a wonderful pedestrian-only zone and plenty to see and do BUT Nurnberg offers a great deal MORE to see and do IMO.

But remember, "the gold of Ulm rules the world."

With a car you'll have plenty of options.

Yes, I was trying to sound cultured in calling it by the German name. Thanks for your opinion on Nuremburg.

We had a quick stop in Nuremburg this spring and I would highly recommend it . There is plenty to see and do, depending on how much time you want to spend you could probably do it as a day trip but I think it would be a wonderful place to spend the night, especially if you were with walking distance of the old town.

I believe the Palace of Justice in which the Nuremberg trials were held is still standing--at least it was the last time I was in Nuremberg. As I recall, there's a gas station in front of it, but maybe my memory plays me false.

I think the last time I was in the city was in 1998 or 1999, and I was able to take a tour to the huge amphitheater where Hitler staged those impressive rallies which were filmed by Leni Reifenstahl for her film "Triumph of the Will."

I'm not sure whether the amphitheater is still standing.

The first time I visited, back in the 70's, I went to the Kaiserburg, where there was a display of the destruction of the city in the WWII city bombing.

There's also a documentation center, which I've never visited, but which sounds very interesting and which ties in with the rallies.

I'd go to Ulm, the old painted buildings are lovely.

Much of the central pedestrianized area of Augsburg is currently being excavated: It's ambience is not as usual.
Nuremberg is a splendid place, and a tram ride out to the Docucentrum and Zeppelin Field at the former convention centre of the Nazi Party is well-worth the effort.