Same question, especially that if someone is infected with delta he can only infect someone with delta. So delta can be outperformed at the person level only if

Same question, especially that if someone is infected with delta he can only infect someone with delta. So delta can be outperformed at the person level only if the person is infected by both variant at the same time. For me the only way a variant can be outperformed is that all people who get infected get also infected with the other variant OR the first variant for whatever reason stop being transmissible