Its been very hit and miss for me. The engines appear to be optimized differently, but I won't say the DDG results are "good". I just get better results when I search both engines than when I rely on one over the other indefinitely.

chat gpt is a better AI than bard by miles

It does very simple things very well, where as Bard just kinda fumbles everything that isn't geared to its niche knowledge set. But they're both... not great. ChatGPT still hallucinates routinely. Its output is often verbose to the point of repetition. Anything current-events related or otherwise subjective is... dicey at best.

Its the best of the worst, but 9 times out of 10 I'll get a better result fishing for answers on Reddit or a topic-specific Discord or a bog-standard search engine if I put in a good fifteen minutes of serious investigation. I'm just weighing that against the instant-but-substandard answer I can get from AI.