He's certainly had a better overall career than TJ so far but TJ still has 1 1/2 years left. No way TJ will pass him in scoring.
But in every other category it is hard not to say TJ is better except for maybe rebounding.
Passing, dribbling, creating his own shot/for others, defense, etc.
TJ is more valuable to a team that needs a ball handler and playmaker, Tyler more valuable to a team that just needs scoring.