After Munta and Cabba joined forces in a fierce three-minute battle against Vegeta, their stamina was completely exhausted. Super Saiyan Blue consumed far more energy than Super Saiyan 4.
In the original anime, Son Goku and Vegeta often reverted to their Base Form mid-battle, whereas GT's Super Saiyan 4 maintained its transformed state even when Son Goku was unconscious.
"Ha... ha..."
Chapter 217