A.f.a.i.k. you’ll have to look at the cards within it unfortunately. The Pokémon Web booster packs are transparent, but I don’t think there is a difference visible from the front insert card, based on my sealed Pokémon Web booster packs containing the 1st/unlimited edition Moltres:
Also, in case you or anyone else reading this are unaware: the Holofoil cards that are in the packs can be deducted from the barcode on the blue inserts.
All the barcodes for the Pokémon Web booster packs will be of this form: 4521329 013AA B, where the B is a random digit that can be ignored, but the AA can be used to determine which Holofoil Rare is in the pack:
01-04 = Dark Venusaur
05-08 = Dark Charizard
09-12 = Moltres
13-16 = Dark Blastoise
17-20 = Articuno
21-24 = Zapdos
25-28 = Gengar
29-32 = Machamp
Greetz,
Quuador