I think they took some Italian styling cues from boats such as Riva, Fino and a few others.
My fathers boat below I'm the one with the Chin Strap Hat.
The boat had a pair of twin turbo motors with water injection, making 600 hp. For it's time, late 70's, it was a good running boat. The last pic was roughly 12 years ago when I found a fully restored Fino in CT on a weekend boating trip I took with my now wife Jodie.