Momentum 4, but want to achieve true Lossless on iPhone

Hey. I own a pair of Momentum 4s, but want to achieve Lossless on iPhone and I'm not sure if I should buy the BTD 600 dongle (to achieve aptx) and also buy the Apple's Lightning to USB-C, or just simply buy the Apple's dongle and use them wired on iPhone. 1. Which way will give me the best sound quality? 2. And using them wired that way, will it still use Apple's AAC codec? 3. Will Sound Personalization feature work while using Lossless? (I know SP doesn't work with Hi-Res)