as background, i've listened to all ue iems extensively and i currently have the ue7, ue11 and ue live. prior to listening to Premier, i believed that the live were fantastic and couldn't imagine how the Premier could best the live. from experience, the higher the quality of the source system and media, the more impressive the live sound. e.g., i have lotoo pawg touch and lotoo lp6k. the live sound much better on the pawg touch. the live are not the most accurate iems and, for me, they are emotionally very engaging. i listen to music for the emotional experience. accuracy doesn't always equate emotionally involving. listening to music through the live is emotional.
though, i couldn't imagine that the premier could best the live, i entertained an audition. again, high end iems shine with high quality source and media. the main difference between live and premier is resolution. with premier offers another level of separation. with premier, when a bow drags across the violin strings, i hear the micro notes of the various fibers interacting with the strings. it's remarkable. i thought the live offered excellent resolution -compared to ue7 and ue11. the premier takes it to another level. there's just more separation with the premier. i hear more notes in the timpani with premier. i can more easily hear the drummer's fingers sliding across the skin of the drums, as he strikes the drums. premier seems more engaging and creates more of a party in the ears.
i only listened to premier for about 30 mins and so, i'm not sure what his means when listening for many hours. i can and do listen to the live continuously for more than 12 hours without fatigue, while still thoroughly enjoying the experience. i expect that premier will also prove enjoyable for many nonstop hours of listening. i've listened to the live for more than 12 hours in during the past few days and i still find them emotional and terrific. we'll see.