Science fiction, even hard science fiction in its main stream, got pretty uniform over the decades.
If we're talking authors and founding fathers angle, Elite has obviously a very rational, hard sci-fi tone to it, meaning its centred around technology, economy and loosely-agreed 'realism', echoing by it notes of such voices as Arthur Clarke or Stanislaw Lem, with just a touch of Frank Herbert/Issac Asimov's background space-opera politics added to the mix as a flavour (very rightly so on FD's part). The wild-west ruthlessness of the world also brings to mind William Gibson's dystopian cyber-punk tones.
Still, overall it seems to me that although the general tone is closest to Clarke's and Asimov's visions of the future, rationality prevailing over all else.
The Earth-like would be closer to a utopia than a dystopia, given how much space mankind was suddenly granted to combat overpopulation. With cheap fuel and widespread FSD technology, we are generally doing very well as a race and the Blade Runnery type of vibe would not make a lot of sense. Not that I wouldn't want to see it in Elite.
Perhaps a nice, procedural variation could be in place - on one hand a sprawling, overpopulated and overcrowded blade runner-like city in certain places (Federation?), and more utopian, clean and garden-like in others (Empire?).
Judging by Frontier's art direction, there's not much to worry about in that department, it's the gameplay mechanics and loops that are mostly troublesome.