| Field | Xcode 10.1 Beta 2 | Xcode 10.0 GM | Diff |
|---|---|---|---|
| Release type | Beta 2 | GM | different |
| Edition | - | - | same |
| Release date | 2018-10-02 | 2018-09-17 | different |
| Minimum macOS | 10.13.6 | 10.13.6 | same |
| Swift | 4.2.1 | 4.2 | different |
| iOS SDK | 12.1 | 12.0 | different |
| Build | 10O35n | 10A255 | different |
建议：如果你是生产环境主力开发，优先选择 stable 版本；如需验证新 SDK，再考虑 beta。