Eh i doubt it, i mean without spoiler the a91 is only 300 more than premium, so if the paint, seats, and dash are really only 1 off that could explain the price difference without hud.
The worst part is cutting the dash but even the premium ones are just cut dash so just depends if you think you're a patient person. I just bought all the parts required for 300$ with one outstanding thing being the cable which is either already in the dash or costs 50
So the only part that...
So just FYI it is plug and play to swap it out. You just need to buy the cluster if your cluster doesn't have the hud connector(not sure if ours will). you can technically cut your dash to put the hud in too(at your own risk of course). So if you're brave it is possible, you can get cluster+hud...
Another random thought - I had the black one preordered for a bit. Imagine if you were getting that one! Paying more for alcantara seats and blue stitching but losing HUD. OOF