“好看的皮囊千篇一律，有趣的灵魂万里挑一”的英文版可以是：

1. Beautiful skins are the same, interesting souls are one in a thousand。

2. Good-looking skins are the same, the soul of the fun is one of the best。

3. A pretty face may be common, but an interesting soul is a rare find。

建议选择第一个翻译，因为它直接且准确地传达了原句的意思。