🚀 go-pugleaf

I would not assume that the metrics are identical unless the fonts are identical ... that is, one of many fonts that have been licensed from one vendor to another. A lot of the Linotype and Adobe fonts were identical in the early years because (Thomas will correct me if I am remembering this incorrectly) Adobe did the work in making the faces for postScript, using the Linotype libraries extensively. (I assume some licensing fees also applied, one way or the other). 

I have never known two typesetters to build kerning tables with the same values, back when that was a job done in each type shop, so I cannot see where two typographers would use the same metrics on fonts. They would be close, but any variation will make a difference in a long enough job.