Firewires from left to right;
Hellfire - 6'10 (48 litres) a fair amount of rocker and thinned out a bit. Goes well in nice waves and over chest high.
Potatonator - 6'6 (50 litres) a lot foam in this board and a fairly wide tail. This is my groverler.
El Fuego - 6'5 (44 litres) wide point forward and flat rocker. Surfs a bit like a single fin and very fast. A bit of an alrounder but is the smallest of my boards and I find needs nice waves.
The photos don't do the differences justice, if you see them in the flesh the differences are very noticeable.
Hellfire on top of the Potatonator
This one might show the differences a bit better