Found this short article on what the 500C has going on that some might see as better than the regular 500.
There are very few things I'd change about our Fiat 500. I like how it has just enough power to have fun and bumper-car footprint. I also like the concentric gauges. And that's one place where the 500C (convertible) has an edge.
While I like the design of the gauges, the thinner "Univers" font can be a little hard to read.
As you can see in the image above, the cabrio has a thicker font and has fewer callouts (every 20 mph) than the regular 500. I can't say I like the aesthetics of this font, but perhaps the 500 could benefit from a bold Univers font and fewer callouts.
I know, it's a minor detail. It's just the designer in me that surfaces once in a while.