The one on their site is based on the 1968 Rob Walker Lotus 49B. I
think the labelling on the sample card is wrong. The differences
between the car on ttheir site and exoto.com's Walker 49B model is the
color of the windscreen (the real car is yellow), the color of the
rear wing (the real is blue not silver) and the decals. Everything
else looks exact from what I can tell.
I'm guessing it's not labelled correctly due to licensing?
Personally, I don't care what they call the cars if they're modelled
accurately and it's possible to change the decals.
BTW, If you poke around the directories on the site you'll find
Villeneuve's 1982 Ferrari GP car. :)
Jason