SIMILARITIES 
-They are both Lipids 
-They are both composed of part carbon
-They both have hydrocarbon chain tails 
-They both have hydrophobic qualities
-They are both insoluble in water
                    DIFFERENCES
*FATS
-Insulators
-Protection 
-Energy reserves
-3 fatty acids
-3 Carbon glycerol molecule
*STEROIDS 
-Control Metabolic processes
-4 rings of carbon atoms
-Branching carbon atoms
-synthesized from cholesterol 
-Promote muscle growth 
-enhance athletic performance 
-anabolic hormones