Well, now that I actually look at both DD and DGS side by side, I can see that the "hidden" font in DD does look sharper and cleaner than vanilla DD but still less good than SoJ. I can imagine with the amount of text you already have implemented in english that changing it now would be a chore though. What's in the demo works and looks a tad better than DD so I guess that's fine.
What about the evidence text font then? It looks really bulky and in the demo there's one piece of evidence where the far right text overlaps the UI.
I guess you mean this? This font was also included in DGS, it was at one time our dialogue font (the one I didn't have a screenshot for). I know it looks bulky, but it allows us to fit a lot more text in than with the other font.