MP145 Features:

-14.5mm Ultra-Large Planar Magnetic Driver
-Whale Tail & Rorqual Pleats Design
-HIDIZS Pneumatic Sound Tuning Filter
-Target H-2019 Curve & Professional Tuning
-Fully Symmetrical Magnetic Circuit & Hidden Bionic Breathing Holes
-6N Silver-Plated Single-Crystal Copper Cable (3.5mm or 4.4mm, 0.78mm 2-Pin)
-Ergonomic Liquid Silicone Ear Tips for Comfort
-Includes Customized Pouch
-Hi-Res Certified

S9 Pro Plus Features:

-ES9038Q2M High-Performance DAC
-PCM 32bit/768kHz & Native DSD512 Support
-Physical Buttons for Volume & 6 Filter Options
-4.4mm Balanced & 3.5mm Single-Ended Outputs
-138mW@32 (3.5mm) / 180mW@32 (4.4mm)
-RGB Lighting for Sampling Rate Indication
-Universal Compatibility: Windows, Mac, iPad OS, Android, iOS, Harmony OS
-Hi-Res Audio Certified