Since you cant share cards between the two (owning the physical card doesnt give you a free digital copy), there are benefits to sticking to one medium but which one
All MEGA-era boxes guarantee 2 SR+ cards per box
You need a matching color Digimon/Tamer on the field
For players who enjoy combos and unexpected plays, blue, black, and green decks are perfect
You arent really generating any tempo with a wasted Strip Mine, and the only reason I can see this as a useful tactic is if you are potentially shutting off the opponent from getting to a specific mana production you are concerned about (for example, hitting 4 mana to cast Jayemdae Tome, The Abyss, or some other problematic permanent)
I think the restriction and power level are pretty neat in a 100-card format, and I wish the price point was lower