I agree your pics do look very similar.
Here's what info was posted with the Intermeccanica Viva pic:
"In 1982, Nissan released the 200SX. Intermeccanica struck a deal to make a factory authorized convertible. Soon thereafter, Nissan killed the project and handed it to ASC (American Sunroof) because Nissan didn’t want to deal with a smaller company such as Intermeccanica. Intermeccanica brought two cars to the 1981-82 New York autoshow (one convertible and one with a removable hardtop) but never had a chance to show them. After the deal with Nissan fell through (20 cars into project), Intermeccanica made a deal to sell the tooling to a limousine manufacturer in Mexico. Intermeccanica produced approximately 50 Nissan 200sx convertibles and sold them mostly in Mexico."
Is there a connection with the American Custom Coachworks Nissan 200 SX I wonder?