vegeta's problem with training has Always been that he does it alone, doesn't learn from others and just pushes his body to the breaking point and doesn't rest to let his body recover.
goku on the other hand trains more effective, isn't shy to learn from others and to train with others. and he lets his body rest to recover.
now granted vegeta training under whis is different, because he had to listen in order to achieve blue. bottom line is goku trains more effective