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Dear Customer,How are you?Thanks for your question to our sabbat e16 wireless earbuds.The most difference is the sound performance and the material. At this time, the sound performance is different from the old model E12 and E12 Ultra (deep bass feature). We featured the E16 with an amazing BM Driver-combines dynamic and Balanced armature technology (2 in 1 design), after that, the sound is more open and wider. The mid has a nice natural tone, and the treble is bright without harsh feelings. The E16 also has a lot of detail, you can hear different separation of sound and instruments well. Compared with E12 Ultra, E16 has these features:1. Qualcomm Bluetooth 5.2 3040 chipset, support 2. Qualcomm mirror feature and cvc 8.1 noise cancelling)3. Amazing sound quality.4. Customized speaker (2 in 1 design with dynamic and Balanced armature technology)5. Stylish design with 4 different colors6. Comfortable in-ear design7. Customized ear tips (with 3 foam ear tips and 3 normal ear tips)You will love our Sabbat e16. :)Thank you!