They have no correlation to each other. I would recommend elden ring over sekiro since its much longer if a game, you would get more out of it. It also has a diverse play style where sekiro has a unique style that has a high learning curve. For many people it took them about half the game until the new fighting style “clicked” for them.

So if you already played souls 1, 2 or 3 I would reccomend elden ring. But if youre looking for something different and fresh then play sekiro. Both are amazing games that you should play at some point.

Plus elden rings dlc will be released in the coming months so if you wanted to get into it now is a good time.