But he can, and you and I know he can, and that alone means he can talk better than Khali.
The ability to perform moves well. The ability to sell. The ability to demonstrate emotion in a performance. The ability to string together moves into a sequence. The ability to tell a story. A combination of these factors.
And how is it that Khali plays up to that gimmick? What are the things he does that are specific to his character. Aside from jiggling like he's got two false hips if that's included, how would you know that Khali was a Punjabi Playboy unless you heard the commentator say it.
Tensai has shown that he is a completely different competitor since he was last in WWE. He wrestles with a strong style, resident to Japan. He holds himself in a certain way, grunts and shouts when he attacks which is a Japanese wrestling trait. You could look at Tensai and know what his gimmick is by the way he performs, that is what playing a character means.
I would take Tensai's underwhelming run to the accomplishments of a guy who, if he lost a foot in height couldn't get an indy booking. Khali doesn't get a free pass based mainly upon girth.