London vs Manchester

Would 60k in Manchester vs 70K in London be the better option in your 20s for a mid level role? Manchester housing is so much more affordable (city center flat for yourselves vs 1 bed in house share for the same cost), however there’s definitely less job density meaning eventually you may have to move out to London anyway if you want to get someone else decent growth.

What are people’s thoughts?

EDIT 1:

so I am from just outside of Manchester so I am very familiar with there and love it - if I wanted to save tonnes I could live at home and get a massive amount for deposit, so financially short term it would be a no brainer (ignoring social aspect)

EDIT 2:

The 60k position is fully remote, other is hybrid