The city is intact when Nappa and Vegeta aren't dokkaned. After you dokkan them the background changes to the same city but destroyed. This is most likely referencing the state of the city before and after they paid a visit.
Goku and Vegeta both share one half of Golden Frieza on their cards background
Both Vegeta and Tarble using the same pose, a reference that they are brothers.
Both cards are a reference to SS2 Goku and Majin Vegeta's battle before Majin Buu was ressurected. Both cards show the battle in different view (of the charcater itself)
The poses used for the SR Android #17 & #18 card have been copied from the 2 seperates ones, along with this they had their card art revamped for the SR with a more renewed color and blue outline to pop-out more.
Tiencha, the balding mediocre fusion between Tien and Yamcha, parodies the pose of Super Gogeta, the powerfully superior fusion between Goku and Vegeta. The fusions themselves are references to each pair's rivalry, i.e., the rivalry between Goku and Vegeta is mirrored by the rivalry between Tien and Yamcha during the 22nd and 23rd World Martial Arts Tournaments.
Bio-Broly copies the pose of LSS Broly. A reference to Bio-Broly being a hideous monster while Broly used to say he isn't a monster but a devil?
Depending on the card you can see the left, middle or right part of Gohan's, Goku's and Goten's faces respectively. A reference to their Family Kamehameha against Broly.
This Goku is the only card that changes its "Type" when Dokkan Awakening. Global version only.
This Goku is the only card that stays the same rarity after Dokkan Awakening. Global version only.
If you try to give yourself the user name "God" or a name with "God" in the title, the game won't allow it.
The new Ginyu Force Cards (Burter, Guldo, Captain Ginyu, Jeice, Recoome and their dokkan awakenings) represent each type in the game (with their skin colour and position in the team). Burter is AGL because he is the "fastest in the universe". Guldo is TEQ with his special techniques that can stop time. Ginyu is INT as the head of the Ginyu Force and for his intelligent battle strategies (luring them in and taking their power/body). Jeice is STR since he is the muscle of the team. Recoome is PHY because he is the physically bulkiest of the team.