the studio display is the LG Ultrafine 5k displayport MST display in an aluminum shell.
studio display does not use the more advanced displayport 1.4 compression in the 32" 6k xdr. Apple is effectively selling a panel that first came out in 2014 when imac 5k was introduced.
You can even argue the base Studio Display is overpriced because 10th gen imac 27" 5k with the same panel plus a whole computer is 1799