You won't find this font on Google Fonts or Adobe Fonts (where standard Helvetica Neue lives). Because of its exclusivity and license restrictions, it thrives in specific environments:
PostScript Type 1 hinting is code embedded in the font that tells the printer how to snap curves to the pixel grid at small sizes. The "Exclusive" version has aggressive stems. At 9pt on a 600 DPI laser printer, the stems of the 'n' and 'm' in the T1 Exclusive will appear visibly blacker and sturdier than an OpenType version printed on the same device. helvetica neue t1 55 roman exclusive
Converting “Exclusive” fonts may violate the original EULA if the license did not permit format shifting. Always check your license agreement. You won't find this font on Google Fonts