While I consider myself to be a fan of both vixens, I am without a doubt voting for Alexis Texas. Not only does she have one of the most incredible asses in porn history, but her charisma is rarely matched. From her dirty talk to her blwjobs, everything about her performances screams "real" to me.
That being said, I still love KLK. She's one of the top performers out there today, and she tends to be more adventurous than Alexis.