Is apple lightning dac worse than BT?

So I heard that the apple donge is quite alright for what it offers. The thing is I usually listen to my Momentum 4s through BT. I was amazed by how good Pompeii MMXXIII was so I grabed the dongle hoping to get slightly better experience, but for some reason it sounded way worse than with BT, which somehow doesn’t make sense to me. It sounded flat and not as dynamic, almost as if it lacked the 3Dness (sorry for lack of good terms).

Have I misunderstood something, or why could this have happened?