I don't think these situation can be compared..to me both of them were creepy but if you still wanna compare Prince's behavior was more disrespectful.
He did it without Priya knowing and he isn't even her friend while Rishab licked her fingers in front of her of course lol and she clearly said she didn't mind it cause Rishab is her friend but because Kawaaljeet said something she was bringing it up. Making Kish a dog was awful but it's wasn't crossing private boundaries.