Bourgeois style has negative connotations (the term was coined as derogatory). I personally don't believe in such things.
Basically, it's a person who dresses from the outside-in and considers themselves above fashion within any timely or fashionable context wears expensive good (or 'good') taste with no deviation. Every generation has a new uniform. For example, in the early twentieth century Chanel's LBD and less-structured suit was seen as revolutionary, by the time of her death it was thought of as old fashioned, conventional and middle-class-boring. Street fashion and high fashion used to pride themselves on shaking and riling against this uniform but both have now been co-opted by the process of hegemony and incorporated into the present-day armour. It's very hard to see the uniform or an alternative any more as the old distinctions of what has been considered conservative or bohemian have merged more and more for 50 years, they are now virtually indistinguishable. This is presumably probably why people now have to ask how to look more sophisticated and there seems to be some debate about it. The only thing we can go back to is original definitions.