The absolute biggest giveaway is Anachronistic Texturing
Plus, if another phoenix dies, you can cast Syrix straight from your graveyard, making it a resilient threat that keeps coming back for more action
Opening booster packs adds an element of randomness to your deckbuilding, but with things like Secret Packs to help you narrow in on the deck you want to build, you shoiuldn't really have to use your Craft Points to make the majority of a deck.
For card-heavy games where players hold many cards, bridge-size playing cards (2.25 x 3.5) feel easier to fan and stack, especially for smaller hands
Off to a great start already
Unlike the real game, which offers the ability to both trade and purchase cards from other players which massively streamlines the process of getting new cards, Yu-Gi-Oh Master Duel doesnt offer that option