The carnivals in Quebec and Louisiana are more similar than different.

Quebec is almost 90% French speaking, all the signs are in French,most of the people speak French all the time, i suppose many think they are going to a little piece of France when they go to Quebec. Louisiana French is just cultural heritage from a bygone era and not that prevalent compared to Quebec.

Explanation:

Quebec is way more liberal in a political sense than Louisiana for starters, plus it is way more influenced by French culture including having a majority of the population speaking French. Most people in Louisiana don't speak the French language for starters (mostly because they discouraged it in the past, although there are some attempts to revive the language in schools) and in Northern Louisiana most people don't even have a French/French Creole influence or background. Not to mention the fact that Quebec lacks the large influence of Blacks/African Americans which provided a large foundation for current Louisiana culture.