Although it’s really only a few extra seconds of footage, this increased screen time really helps sell the idea that Leto could’ve given a much better performance than the film would lead us to believe.
Here we get to see Jared Leto cut loose as a VERY unhinged Joker who has not yet fallen for Harleen Quinzel (Margot Robbie).
The first different you will notice between the theatrical cut of Suicide Squad and the Extended Cut is the fact that the Arkham Asylum sequence is slightly longer.