ok, the normal state, every saiyan looks different;
general: dark hair, with a tail.
ssj1: hair turns gold, sticks up somewhat
gold aura
increased stregnth/speed
ssj2:
hair sticks strait up, hair grows 2 inches (roughly)
constant sparking
muscle density GREATLY increased, this allows for added strength without speed drawbacks like in ussj
This transformation makes it possible to get to ssj4 strength without actuall going ssj4 (with training)
Vegeta's ssj2 pl in GT: 900 million
Kakarots ssj4: 1 billion
ssj3:
Hair gets to 3 - 6 feet, depending on original hair length
Eyebrows dissappear (i watched "super saiyan 3?!, and i dont see eyebrows"
Muscle mass increased greatly again, speed and power level increased.
Sparking still present, hair has slight hint of greenish tint.
ssj4:
The "hybrid" super-saiyan transformation recquires a tail, making it not a true super-saiyan transformation. Validity of this transformation make GT a "inferior" version of dragonball series.
Fur grows on body
Power, strength and speed increased 5 fold.
hair has red tint, as well as the fur. This in my opinion is the worst transformation possible. Its ugly and doesn't go with "classic" super saiyans
Note: ssj1 - 3 have tail glow gold, if tail is still present.
ssj = super saiya-jin (japanese)
ss = super saiyan (english)