hifiman ef600

Hi all, Currently have a RME ADI 2 and an EF400 but am upgrading and am stuck between these 2 DACs and was wondering if anyone has auditioned them and thus first hand experience and will love your inputs. My setup is purely for headphone usage. Thanks!

There is a new HIFIMAN EF600 desktop DAC/Amp available for preorder: https://apos.audio/products/hifiman-ef600-desktop-dac-amp The TLDR; is: Shaped like a headphone stand 2x R2R Ladder DAC It's an EF400 with a different shape, 2 DAC chips, and more input More inputs than the EF400s USB, (RCA...