Hey.

LLM of one year will be in depth specialisation in an area of law. As LLM is research based, you will have to work hard for this. It will be beneficial as your course structure will be specific and you will able to save 1 year. 

Most of the universities and institutes have introduced 1 year LLMs among their programmes.

You can use the link below to know more about 1 year LLM.

https://www.google.co.in/amp/s/www.careers360.com/Law/Gear-up-for-one-year-LLM%3famp