Is applying for an immigrant visa the same as applying for a green card?

You are a little confused.

It's all the same in any country, but now people say various things.

To be exact,

an immigrant visa is not equal to a green card ... because you just applied for a visa to go to the United States instead of being in the United States now ...

The definition of a green card is the proof of permanent residence ... This is after you go to the United States through normal procedures and you need to be qualified. A green card can only be issued to you if you apply for permanent residence.

A green card does not mean that you have the nationality of this immigrant country.

A green card is only proof of your right to permanent residence.

You are only applying for an immigrant visa now, and you have not come to the United States. How can it be compared with a green card?