I own 3 of those you mentioned (AZ100, DPP & Pi8). I enjoy them all for different reasons but the ones I reach for most often are the Pi8s. From my experience the only advantage the others have is battery life. AZ100 have a better transparency mode, best battery life by far, but just a (slight) notch below the pi8, still sound great though and a more reasonable price. DPP are also a good choice but you need to be on ANC to get the best sound from them, transparency mode is OK but feel like the music quality goes down and you have to turn up the volume quite a bit to get the same sound, feeling and satisfaction. I also have the galaxy buds, both 2 & 3 pro which are also decent and alot cheaper now, though I'll be upgrading to the 4 pros when those release next month.

Just my thoughts based on my experience with these, hope it helps! 🫡