Problem partially solved... I managed to recapture the same scenes, both from the NTSC and PAL UK SE... I've done the NTSC using the level settings "as is", and, even if the pink is visible, is still lower than the SET [ruLes]; then I lowered the saturation bar from 64 to 40 before capture the PAL, and result are much similar to the test capture. Below, PAL, NTSC, enanched mix.
Maybe I'm forced to redo the 1997 SE project... you could donwload the clip if you want; you could find it in this post where I'll continue to test laserdisc captures and upscales.