no man they dont..
not like this..
do you see the similaritys between the Conti GT and the F spur? the f spur is like a Conti GT with 2 more doors..nothing else is change afaik..
and this now.. looks like a Conti with no roof..

now i understand your point.. for example the C class and the W220 looked similar but not in this way.. this like copying one design and making 3 cars..