Tange levin/passage headset alternative

Sorry to resurrect an old thread, but does anyone know if theres actually any difference between the regular Tange Levin and the NJS version? Is there an actual difference or is it just that one comes with an njs stamp and the other doesnt?

I just bought a Levin NJS Alloy Headset.

They are different from the regular CDS Levin in that they look like an early Campag Record headset. The CDS is much plainer and they're all slightly different sizes.

Regular steel CDS Levin: 33.3 mm Stack Height

Levin NJS Chromed Steel: 38.2mm Stack

Levin NJS Alloy: 37.5 mm stack height