Doubt you'll find anyone who has seriously compared them side-by-side. You'll just have to roll the dice based on impressions of each. I was in similar situation a few months ago and chose the Pontus II, which is working out great for me.
Based on the number of comments, it seems like the Audio GD has sold in smaller numbers, so perhaps focus your search terms on it, will find you comparisons vs. the Denafrips. e.g. Search "Audio GD R8 vs."
Cheers,
Spencer
Based on the number of comments, it seems like the Audio GD has sold in smaller numbers, so perhaps focus your search terms on it, will find you comparisons vs. the Denafrips. e.g. Search "Audio GD R8 vs."
Cheers,
Spencer