Chapter 151 of Dragon Ball actually proves the difference between Vegeta and Goku when it comes to transforming into Super Saiyan 4 in Dragon Ball GT.
Every Important Dragon Ball Transformation, Power-Up, and Fusion So Far - IGN
Dragon Ball AF Explained
DBGT-Goku SSJ4 Dragon ball, Dragon ball z, Dragon ball super, db
Super Saiyan 4 is Goku's Perfect Dragon Ball Form (For One Reason)
SP Super Saiyan 4 Goku (Purple) Dragon Ball Legends Wiki - GamePress
toyfiendscollectibles.com/cdn/shop/products/b5dd0f
Dragon ball GT Goku Dragon ball, Goku, Dragon ball super goku
Super Saiyan God, Dragon Ball Wiki
Dragon Ball GT Saikyou!! Gokuu ga Super Saiya-jin 4 ni!! (TV
Why Dragon Ball GT's Super Saiyan 4 Actually Matters
images-wixmp-ed30a86b8c4ca887773594c2.wixmp.com/f/
How Goku Got All Of His Forms in Dragon Ball