Here is the description from the rules document:
Note that 1 additional level of Taijutsu straight up adds 1 die to the roll. This 1 die participates in resolving the winner and in calculating the damage at 100%.
1 additional level of Youthful Fist, on the other hand, adds only half a die to the roll, and only to damage-calculating part.
So yeah, I'd say Youthful Fist as it is now badly needs rebalancing.
The labels are there, they are just black on transparent background, and therefore hard to see with the default SV theme. I'll see if I can improve the readability next time.