Hi there! I was looking at MergeGlyphs app as I need to compare the width between all characters of 2 Glyphs files. Do you think that this feature could be added in the future? As the RSB and LSB are compared! Thank you!
In Glyphs, try Edit > Compare Fonts.
There also is a mekkablue script called Compare Frontmost Fonts > Compare Metrics, which lists all widths that are not the same between the two frontmost fonts in Glyphs.
Awesome! Thank you Rainer. (Sorry for the late reply – I must turn on my notifications as I forgot to check the forum)