Threat on Demand
The main difference? Warriors are better in more desperate times. When sh*t hits the fan – you’re going to want a warrior. When resources are tight, and adds spawn, Warriors are much much better at picking them up and making them stick. Paladins have superior resource management and will match a warriors threat over time. Warriors excels at keeping up with initial burst aggro when picking up and killing newly spawned adds.

Adds, AoE
In both single target and AoE situations, Warriors will out-threat Paladins any day. Paladins also have decent AoE threat, but simply pale in comparison to what Warriors can do to multiple enemies, and struggle alot less to build up initial aggro. It’s like Warriors WANT adds to spawn, and lots of them, while Paladins would rather not!