??
An unhardened 1080 Pound Hawk
A hardened nameless slash.
But at the same time you've got Apo or King blocking his hardened sword swings, whereas Fuji gets pushed back by a gravity restricted air slash even.
What do you think about that, mate:
I'd argue that the pound cannon packs much more power, cause it's most likely infused with the same hakiblast that brawlers otherwise put into the barrier like application, but it simply lacks the refinement/precision and therefore it ends up being more of a wave of destruction instead of a super clean cutting attack.
Same imo applies fittingly to Mihawk's gigantic air slash and that iceberg cutter during MF.
With that -hakiblast infusion concept- you can easily explain how Zoro made his pound cannons 10times more powerful over the timeskip and how his air slash game can be more powerful than his physical attacks, even if they are used under physical strength- restricting parameters, like when Fuji put him under increased gravity.
So hardened haki >> non hardened invisible haki mass (primarily just there for Logia fighting), but the actual released hakiblast (barrier haki, air slash/projectile enhancement) >> hardening + physical strength in pure AP, if the user's strength is not extraordinary high (Big Mom lvl stuff), but less efficient or rather said, it pulls away from the original attack style/type.
That's the most coherent concept I personally could come up with.