I don't recall where I posted this, but you can change from uppercase to lowercase (same name) with the series x (xbox), but you cannot with psn. once a name is taken on psn, it's gone for good, even if you change it, which is extremely stupid. anyway, I deleted the cache to my series x, which seemed to delete my saved games as it's the only way to get the new name to work on 360 games. it did download the saves from cloud, so that's definitely a life saver. no saves were lost as a result. just kinda bummed that I can't have the same name on both systems due to the fact that I can change to all lowercase on the series x but not on the ps5.