It is, because it's more authentic. The problem with a lot of these "bistro" restaurants is that they're based on a cliché of French bistro food and French bistro environment. Everything from the corny decor, with the faux Parisian trappings and the faux smokey mirrors with the wine list written on them, to the menus with the obligatory steak frites and croque monsier. And that's, basically, the problem with the concept -- it's "faux" from the beginning.
I used to like going to La Diner (or was it Le Diner?), which was an authentic French bistro run by a couple from France. The menu consisted of classic bistro dishes, but the authenticity made all the difference. You felt like you were in a real place, not as if you were entering into someone's idea of what a real place might look like. There is a difference.