If you force me to pick one I'll go with Wei Yi.
Ding Liren or Wei Yi

Ding Liren's play is indeed more suited for the world's elite. Wei Yi is indeed a very aggresive player, and some may argue is just full of tricks.... but then again, that was what was said of Tal..

Liren played more stable compared to WeiYi, in fact WeiYi's playing is famous for his tactics and agressiveness(he's young,can be understand).
For the sake of the future of chess, I will pick WeiYi. He will bring us surprises, matter of time.
China's strength in chess is one to be reckoned with, almost on par with Russia ( based on rating). Should be about time a Chinese player plays and wins in a Candidates Tournament and challenges the reigning Champ, whether it be Carlsen or someone else. But who will it be? The two most promising players from China are GMs Ding Liren and Wei Yi. Wonder who is better? Im a huge fan of Ding, but Wei Yi's play has made me wonder whether the teenager has actually surpassed DIng.
Sample game
A full bloody battle between both players.