Compared to the change from base to SSJ, SSJ2 is barely noticeable in terms of changing the physical appearance & power of a Saiyan. Additionally, for a hairstyle like Vegeta's, SSJ2 is also barely distinguishable from SSJ.
SSJ3 takes a step in the right direction by: making hair incredibly long, altering the eyes to include both an iris & pupil, receding the eyebrows to exemplify a prominent brow ridge, and quadrupling the Saiyan's power from SSJ2. However, SSJ3 is ultimately just an eyebrowless, long-haired SSJ with a powerup that could be better.
SSJ4, on the other hand, actually seems like a true progression from SSJ just as SSJ is to base. SSJ4 returns the hair to normal color and becomes longer & bushier, red fur covers the upper body & tail, the eyes look simian-like, clothes can materialize or be altered(somehow), and the power is at least a hundred-fold greater than SSJ. These differences really separate SSJ4 from just being SSJ with minor differences and indicate that SSJ4 might actually be the true step-up in the SSJ lineage.
Do you think SSJ4 could be considered the real "SSJ2" from a perspective of design & power?
