Cost of living in Ljubljana (Slovenia) is 11% cheaper than in Andorra la Vella (Andorra)
This comparison is lacking data. It provides a decent comparison, but it is not yet reliable. It is based on 809 prices entered by 76 different people.
For example, to keep the same standard of living that would require €3,300 in Andorra la Vella you would need to make just about €2,944 in Ljubljana.