| Field | Xcode 9.3.1 | Xcode 9.3 | Diff |
|---|---|---|---|
| Release type | stable | stable | same |
| Edition | - | - | same |
| Release date | 2018-05-10 | 2018-03-29 | different |
| Minimum macOS | 10.13.2 | 10.13.2 | same |
| Swift | 4.1 | 4.1 | same |
| iOS SDK | 11.3 | 11.3 | same |
| Build | 9E501 | 9E145 | different |
Recommendation: keep production teams on stable releases unless you need to validate new SDK capabilities.