I was hesitant with this album...
If you look at track 2 & 13, the spectrums are the same with both 320kbps & flac (they cut just under 20khz).
Rest of the tracks looked fine to me.
Yes, because is what I said about the recording stems.
Another example are the electronic or drone composers, like Junkie XL, where the sounds are cut willfully to create a particular soundeffect.
This from the new "The Dark Tower" soundtrack:
http://image.ibb.co/eDOgZc/1.gif
This from "Need for Speed - ProStreet" soundtrack:
http://image.ibb.co/k95H7x/2.gif
This from "The Hunter - Journey Returns":
http://image.ibb.co/dhLjnx/3.gif
This from "Aegri Somnia - Endtime Psalms":
http://image.ibb.co/nNZYfH/4.gif
This from "Sniper Ghost Warrior":
http://image.ibb.co/i7M77x/5.gif
And like this I can take another 9.999 examples more.
The album is lossless, with few lossy samples, but lossless mastering after all, you can put again the link to the lossless version if you want.