EVIL Time is just PASS TIme 4v4 with an inverted item whitelist.
Normally, PASS Time 4v4's item whitelist consists of movement based weapons, such as the Gunboats and Market Gardener for Soldier, the Ali Baba's Wee Booties and Splendid Screenfor Demoman,
PASS Time 4v4 also has 4 players on each team, but EVIL Time has 3 players on each team, due to the way the match can get insanely chaotic with 4 players.
EVIL Time's whitelist consists of items such as the Stickybomb Launcher, Quickiebomb launcher, and Tide Turner for Demoman, and items like the Buff Banner and many more for Soldier.
Some parts of the whitelist remain unchanged though, as they are fundemental parts of the gameplay, such as the Market Gardener for Soldier.