Most of the VFX were done in the 8-perf VistaVision format, which is higher resolution than standard 4-perf 35mm.
The notes mentioned that the VistaVision VFX shots are being scanned in 8K, all of the standard 35mm is being scanned in 6K.
In this case, it’s a restoration with consistent and meticulous quality; the 35mm is perfect for 6K, and the larger VistaVision is ideal for 8K.