Like an actual AI robot and not just a motionless doll? If so, I guess depends whoever's hotter tbh. I'd take a 9/10 robot over a 5/10 escort (and vice versa) lol. If they're both equally attractive, then I'd probably pick the robot just for the sake of trying out new things
Depends how life like that robot is. If the robot has a very realistic body and all parts worked like a normal human would, I'd probably go for the robot as it's a very unique experience. I also think the robot is safer and doesn't have the chance of being pregnant, nor carry any diseases.