The Sony WM-10 was the smallest casette-playing Walkman, the Sony HX80 is the smallest camera with 30x optical zoom, the Sony Xperia XZ2 Compact is the smallest Android with Snapdragon 845. What can we say, the company loves its petite powerhouses. But is the Xperia XZ2 the better phone? It has a few things going for it, besides the bigger screen. It has a slightly bigger battery, for one, about 300mAh more. Plus, only the big one has wireless charging (Sony's wireless charger can do the respectable 9W). And while it's not standard, there's a version of the big XZ2 with 6GB of RAM while...
Source: https://www.gsmarena.com/weekly_poll_sony_xperia_xz2_takes_on_its_compact_sibling-news-30128.php