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. ALL of the successful coins have had a full reward at the first block.
It was announced well prior to release but the release window, 4 hours, was way too wide