For digital screens, the modern OTF is indistinguishable. For offset printing on a Heidelberg press at 175 LPI, the true T1 Exclusive offers a slightly blacker, more authoritative text block. Whether that matters is down to your obsession.
(Roman/Regular). The first digit indicates weight (5 is regular), and the second indicates width/position (5 is roman). Exclusive: helvetica neue t1 55 roman exclusive
Because Helvetica is neutral, it pairs well with almost any serif font. For digital screens, the modern OTF is indistinguishable
Using Helvetica Neue T1 55 Roman is a "handshake" in the design world. It signals that a brand is established, serious, and values the heritage of Swiss Design (International Typographic Style). Key Technical Specifications Format: Type 1 PostScript (T1) Classification: Neo-Grotesque Sans-Serif Weight: 55 (Roman/Medium) For digital screens