I started with the Oratory EQ and heard quite a notable improvement and for me it took a lot of the “veil” away but it’s been a while since I listened to the stock sound. I just remembered being really impressed with the difference at the time.

Often going back to the original sound (or the original version of other things after upgrading) is a much starker difference than the initial improvement. Try out one of the EQs for a while, like a week or more, with songs you know the best and then try going back to stock with the same songs.

After I grew accustom to the sound and started using the 560s for gaming and other things I adjusted the 6XX EQ more to taste and increased the highs a bit more (by reducing the negative DB adjustments from Oratory in the upper mids and highs) and added a touch more bass. Probably has a mild V shape now and makes even more crisp and exiting.

It could really depend on the type of music you listened to as well.