The product pages on the main site make this impossible to determine. I want to fill out this grid:
+----------------+--------------------+-----+-----+-----+------+
| | Connectors | 1ft | 3ft | 6ft | 10ft |
+----------------+--------------------+-----+-----+-----+------+
| Powerline III | USB-A to Lightning | ✅ | ✅ | | |
| +--------------------+-----+-----+-----+------+
| | USB-C to Lightning | | | | |
+----------------+--------------------+-----+-----+-----+------+
| Powerline+ III | USB-A to Lightning | | ✅ | ✅ | ✅ |
| +--------------------+-----+-----+-----+------+
| | USB-C to Lightning | | ✅ | | |
+----------------+--------------------+-----+-----+-----+------+