Regardless of how it's (mis) labeled, the car in your link is a 356B cabriolet.
The "Convertible D" was a one year only (1959) speedster replacement with an 356A body. The Convertable D had a dash just like the speedsters with an eyebrow. Coupes and cabriolets had a dash similar to the one in your pictures - it was a completely different (flat topped) dashboard.
The car in your link is mislabled in the article. It's not a "Roadster" the 356B Roadster replaced the Convertible D, and had a very similar racier, rakish Convertible D-type windshield and dash with the eyebrow.
The way early 356s went was: the coupes and cabriolets had the flat top dash, speedsters, Ds, and roadsters had the eyebrow. The coupes were for sensible people, the Cabriolets were for people who really wanted a speedster (or later on a "D" or Roadster), but who's significant other did not care for tousled hair. The windshields on Cabriolets are very similar to the coupes, the "D" and Roadster are lower.
This is a "B" bodied Roadster:
If you look closely, you can see the eyebrow. I'm not a fan of "B" or "C" cars with bumpers, but they look pretty fantastic in outlaw trim (at least to my eye).