I guess the way I try to think of it is in terms of Smithian economics versus Marxist economics. So:
option 1 -- 100% Smithian
option 2 -- 75/25 Smithian
option 3 -- 50/50
option 4 -- 75/25 Marxist
Of course, that's not really any less vague than it would be otherwise.
kind of a stupid continuum considering Smith was one of Marx's main influences and they agreed on some key points - like estrangement of labour.
The whole the British Political Economy tradition was one of Marx's major influences in itself (not just Smith, but Ricardo and others as well; Marx was a great intellectual synthesizer of early 19th Century ideas).
People typically are influenced by their forebears. They can deeply disagree with their influences, though. Of course, I'm rather uncomfortable with the notion of an ideological continuum in the first place.