🚀 go-pugleaf

How much difference is there between the same font as resold by different vendors? Is it just a question of characters? Or are any of the metrics ever changed? 

Here's a for instance. 

I've just been looking at the Gill Sans CD that Linotype is advertising -- it seems to have the same 15 fonts that Adobe sells (though at a much lower price: 100 USD for the "eCd"). 

None of these contain "old style figures." But they do seem to correspond pretty directly to Monotype's Gill Sans volume 1, volume 2, Display volume 1 and part of Display volume 2. And there are SC & OSF volumes corresponding to 1 & 2. 

Is there any way to tell that these share the same metrics before purchasing? 

I have asked both Adobe & Monotype salespeople on line and have found that neither could answer with any real conviction or authority. 

My assumption would have been that they differ only in the occasional character, but not in the metrics. (And that was my experience with an Ehrhardt MT from Adobe, and the expert set from Monotype.) 

But one would like actually to know! 

Thanks. 

Victor