Although there is nothing wrong with Bertone's design for the Fiat 850 Spider, they also released their own version that is known as the "Bertone Racer". Available as Spider (with optional hardtop) and as Berlinetta with fixed roof. Of course there have to be differences, otherwise you can forget about sales numbers. Italian magazine Quattroruote published an article in 1968 explaining those differences:

850 bertone 1968

And to rub in the true beauty of the 850 Spider, this beautiful picture:

850 spider 1968