The Tommy Kaira ZZ2 is clearly the best Roadster comparison by these pictures.
It looks bigger and that windshield (screen) is raked back more, but air-intakes aside, it's a ringer.
Did it inspire? I'm not inclined to think Barney Hatt saw one or even had a hand in the "Tommy" design but I am basing this opinion on absolutely nothing but Martin’s description of the design process evolution http://www.teslamotors.com/blog2/?p=7
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