It's a comparison of their entire line of cars each brand has as a whole. Their overall expected reliability, and customer satisfaction. That's why it says Genesis is #1. They only have two car models and have less to get wrong compared to Lexus and Audi which have six and eight different models.
I've driven lots of different cars in the same class as my Audi, but my last two cars have been Audi because I just like them overall so much better than my BMWs and Mercedes of the past.
I used to only drive trucks (Ford) when I lived in Texas (my ex-wife changed me to driving luxury cars) Though, I am having the urge to buy another truck to keep with my car. I'm leaning towards Tacoma as my friend had a Toyota truck that looked great and ran great. Though the current line of Tacoma trucks I find a bit ugly.
Maybe a used one that had better looks is the better deal here.