DDG has improved substantially recently. I've had some technical search queries that gave me 2-3 results on DDG, and when I used the !g bang to lookup in Google, I got a "no results" page. =P
DDG is better at technical stuff and has been for a while.
It's not as good at finding obscure forum posts related to a query however
Worse in what way?
I assume quality of results, but the context was sort of lost in the thread you replied to.