Awareness of this coin still seems low - is there a good post for why DGC is better than WDC that I can refer others too? 
It does not exist. DGC is merely a clone of WDC. The only differences are the block reward and the block time.
DGC had a much cleaner release with gradually escalating rewards. WDC was a surprise release (couple hours of notice) with full reward starting at block 1
Just goes to show how much you know about WDC. It was announced 4 days prior to release. And to top that off, DGC was announced on the same day that WDC launched. I don't know if this was just coincidence or planned but it's water under the bridge now. ALL of the successful coins have had a full reward at the first block.