1. A vehicular speech recognition system comprising: a plurality of speech recognition apparatuses that are mounted to a vehicle; and a speech recognition controller that, when speech recognition of an inputted speech is performed individually by the plurality of speech recognition apparatuses to provide a plurality of results of the speech recognition, selects and adopts one result of the speech recognition from among the plurality of results of the speech recognition based on contents of the plurality of results of the speech recognition, wherein the plurality of speech recognition apparatuses have different recognition dictionaries for the speech recognition, wherein the recognition dictionaries have different command-recognition dictionaries for the speech recognition of commands.