>>713099875
There's also better enemy variety.
>Traitors
>Chaos Beastmen
>Spindle Drones
>Ur Ghuls
>Negavolt Cultists
>Rogue Psykers
>Chaos Space Marines mini-bosses
>Chaos Lord boss
>Ambull mini-boss (with Borewyrms)
Not to mention they can easily toss in some other enemies via Kill Team groups.