DDD won't have any analog hiss, but that in and of itself is a pretty minor component of audio quality (assuming it's not overwhelmingly loud, which is rarely the case). So, in principle, DDD *can* have better quality, and some DDD recordings sound amazing. But most new popular music sounds awful, and I imagine many new releases are DDD.
Finding the best sound of a particular recording is hard work. New remastering is often an improvement, but can also make things sound worse through, typically through making the sound more 'modern' by increasing loudness and dynamic compression. I wish it was easy to find a reliable assessment of the audio quality of various masterings/editions/releases of the same music...but it isnt'...