One major difference that we should not forget about Cities Skylines is that it’s not their first game. The game is coming after Cities in Motion 1 and 2. I haven’t played CiM2 but I used to play to CiM1 and it was crappy as hell.
All we can wish to Urban Game is to have the same kind of approach than Paradox and have TF evolve over time to something as well finished as Cities Skylines, with tons of attention to details and no major bugs registered upon release of the game (something EA should also look at if they want to release another SimCity in the future).