This format is known for its slower, more strategic game play, and for showcasing the introduction of Synchro Monsters into the game, like Stardust Dragon and Goyo Guardian
The Doctor Who Top Trumps (original series) was mocked because the historical characters had to be beefed up for play balance, so you ended up with Joan of Arc being able to defeat a Sea Devil or suchlike
From a card design standpoint, this is captured with the creation of the Daybound/Nightbound mechanic on werewolves
Additionally, you can have The Fourteenth Doctor enter the battlefield as a copy of any Doctor card put in your graveyard on that turn
Then, give up to 1 of your opponent's Characters 2000 power during this turn
English), which affects its value