What's the difference between American wedding green card ir6 and ir 1?

IR 1 and IR6 are permanent green cards, which are renewed every ten years.

The difference is that IR 1 is a marriage visa that has not been applied for in the United States.

And IR6 refers to the type of identity adjustment in the United States. For example, some spouses of American citizens applied for a CR 1 visa at first, but they only got a green card for two years after arriving in the United States, and they will apply for a permanent green card soon, so the new green card will change from the previous CR 1 to IR6, because their status was adjusted in the United States.