At my new position, they are serving a web-font called Helvetica Neue W01. However, I can’t seem to trace its origin, as the original people who installed it are no longer there. I’m trying to understand this because the brand’s official font is Helvetica Neue LT Std, which has a completely different vertical matrix (higher) compared to the existing web-font. I’m eager to get to the bottom of this. Any help would be greatly appreciated.

Screenshot attached.

The W01 version is likely just a webfont version. It’s not meant to be installed in MacOS (technically or legally) and not meant to look good there. In the other version, LT just stands for the foundry (Linotype) and STD for a standard character set. So, both versions can indeed be the same design despite the differences in the names.