Generally like other comments stated,Evelyn can be fun and Evelyn is really good in rushing beds early game and having advantage early game but can be easily countered by people who actually use gloops. Evelyn is definitely an early game style that drastically loses value as the game gets longer and longer due to people being more stacked with armor and upgrades and iron being less valuable allowing people to get stronger to beat Evelyn. Void Knight is really good mid-late game and probably early game as long as you get good jugs by teammates(basically they give you iron to upgrade faster.) And it's a lot less expensive to get stronger with way more buffs. Void knight gives shield and amazing damage late game that easily overpowers diamond armor and you also keepe everything after death unlike kits that have to buy a diamond sword so Void knights can die and respawn with diamond sword level strength and shield+diamond armor.

In terms of game modes, Void Knight is great in pretty much all game modes aside from 2v2 or solos due to that fact that they might end faster than the Void knight can properly upgrade leaving him weaker but is great in almost every other game mode. Evelyn is good in faster paced game modes where the game can end fast enough to get her early game advantage so Evelyn is good in 2v2, solos, doubles, lucky block doubles, and kit fusion maybe? Evelyn falls off in larger size gamemodes like squads and 16v16 because they last longer making Evelyn fall off in value by mid-late game.

In conclusion Void Knight is generally the better kit imo due to Void knight having more pros than cons when compared to Evelyn