| Layer | Altium | KiCad | Status | Notes

+--------------+-----+-----------+----+
| Outline      | GM1 | Edge.Cuts | OK | 100% match as-is
|              |     |           |    |
| Top          | GTL | F.Cu      | OK | 99% match (difference: thermal reliefs, corner rounding, cosmetic pouring)
| Internal #1  | GP1 | In1.Cu    | ?  | Negative Plane
| Internal #2  | G1  | In2.Cu    | ?  |
| Internal #3  | GP2 | In3.Cu    | ?  | Negative Plane
| Internal #4  | GP3 | In4.Cu    | ?  | Negative Plane
| Internal #5  | G2  | In5.Cu    | ?  | 
| Internal #6  | GP4 | In6.Cu    | ?  | Negative Plane 
| Bottom       | GBL | B.Cu      | ?  |
|              |     |           |    |
| Silk Top     | GTO | F.SilkS   | ?  |
| Silk Bottom  | GBO | B.SilkS   | ?  |
|              |     |           |    |
| Mask Top     | GTS | F.Mask    | ?  |
| Mask Bottom  | GBS | B.Mask    | ?  |
|              |     |           |    |
| Paste Top    | GTP | F.Paste   | ?  |
| Paste Bottom | GBP | B.Paste   | ?  |
+--------------+-----+-----------+----+