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Pretty sure they are interchangeable. I have an ARC that says "Advanced Reading Copy/Uncorrected Proof" on the top of the cover.

I do have a thought that all pre release copies are proofs but...

It really is an ugly case. For 3k or 4K I’d expect way more.

Here is a direct link to the post: https://www.thedarktower.org/palaver/showthread.php?17920-Book-Collection-Anonymous&p=1036008&viewfull=1#post1036008

Anonymous has a very nice collection.