Why did trunk's ssj hair style change at the end of the cell saga

Why does Super Saiyan's transformation only change their hair

Future Trunks/Biography, Dragon Ball Wiki

When I was 12 I wanted to be Trunks. That was my bowl cut faze

static1.cbrimages.com/wordpress/wp-content/uploads

Do Super Saiyans Make Sense Anymore?

S.H.Figuarts SUPER SAIYAN TRUNKS -INFINITE LATENT SUPER POWER

Future Trunks, Dragon Ball Wiki

Future Trunks (Cell Saga) Dragon ball, Anime dragon ball, Dragon

Dragon Ball Z: What Does SSJ Mean?

Why did trunk's ssj hair style change at the end of the cell saga