What is the difference between Login authentication using AAA and Login Local

Hello,
I am currently studying my CCNA and I am curious as to what is the difference between configuring the below 2 options, which seem to achieve the same outcome to me.
1).
Router(config)#username user1 password pass1
Router(config)#line vty 0 15
Router(config-line)login local
Or
2).
Router(config)#username user1 password pass1
Router(config)#aaa new-model
Router(config)#aaa authentication login LOCAL_AUTH local
Router(config)#line vty 0 15
Router(config-line)#login authentication LOCAL_AUTH
Thanks for your replies

When only looking at the authentication as you have configured it, you are right. Both do the same thing. But when you activate aaa new-model, you have plenty more options to control how your complete AAA is working. Most important, you can send the authentication to an external Authentication-server with RADIUS or TACACS+ or you can do Authorization where the external server controls what you are allowed to do after you have authenticated.
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