The book inside the giftset has the same ISBN as the prior slipcased edition: 9780007440832
I bought both of these when they were released, so I am pretty sure I have first states of both.
The book in the slipcased edition has the number "1" and "Printed and bound in Italy by / Rotolito Lombarda" (and for whatever reason, the b in Lombarda is actually small-caps, not a lower case letter).
The book in the giftset edition has the number "1" and "Printed and bound in China by RR Donnelley APS"
I recall some people showing the facsimile 2016 edition on FB which was a first impression, but with the Wilderland & Thror maps being in the wrong places. Most editions were ok, however. Fortunately that was never repeated.