Rathores look indistinguishable from other Rajputs of Rajasthan. They are certainly less Caucasoid than Rajputs from Haryana, but still have, overall, much sharper facial features and lighter tone as compared to Kannadigas. However, all of this is highly irrelevant to the original question of whether they have south Indian origins. An affirmative standpoint I think is firmly established in academia and any speculations about 'royal Jat' background to early Rathore emergence are not just based on no evidence, but outright ludicrous. Jats had zero presence (political or otherwise) in the areas of southern Rajasthan where the Rathores as a well differentiated and mature Rajput clan are first attested.