This brings up one of the more frustrating things manufacturers do, what exactly is a Sony Experia X? The website for my region (https://www.sonymobile.com/au/p

This brings up one of the more frustrating things manufacturers do, what exactly is a Sony Experia X? The website for my region (https://www.sonymobile.com/au/products/phones/?cpint=mn_sonymobile_smartphones https://www.sonymobile.com/au/products/phones/?cpint=mn_sony...) lists: * Xperia X * Xperia XA * Xperia X Performance * Xperia XZ * Xperia XA1 Ultra * Xperia XA1 * Xperia XZ Premium I have no idea what the compatibility is like between these phones. Are they all variation on a base phone or radically different? Is the X the latest or is the Z? Are we going backwards through the alphabet? There's a lot I dislike about apple, but the one thing they get right is limiting their SKU's.