S&P 500 why is there so many of them?

Hi, so, why is there many S&Ps 500, how to know which one to choose, shouldnt it all be the same, when its basically the same?(or at least i think it should be the same by logic)
I have one that costs 82 DOLARS RIGHT NOW(VUAA)
When i google sap 500 it shows 4 475 (probably dolars but idk)

And other costs different aswell…like what the h3ll

The way i understand, sap 500 means they are investing into 500 or so, companies…and they all copy the same pattern, so why is the price different omg im getting mad