Vos should give a good fight to Ventress in the new canon. On the other hand, Tiin is featless in new canon. That is why I like TCW, I mean Tiin and Kolar were completely incompetent in the movie.
New Canon Vos wins via possessing feat.
__________________ ''You are no warrior, Maul thought. You know nothing of the dark side.'' ★_Darth Maul Respect Thread_★
Tiin is likely more powerful, but other than accolades Quinlan's dueling feats are somewhat superior to Tiin's lack thereof.
Tiin might win via force, but Quinlan should take sabers imo.
__________________ "Happiness is a lie. Life is horror. The light is always dying all across the universe. The last star will flicker out someday, when it does, all that remains is shadow. And I will be its king!"'-Amahl Farouk
Not really, just compare their respective spars against Mace. Windu comfortably stomps Vos three times in the two page match with a smile on his face. Conversely, neither he nor Saesee gain a noticeable edge over one another and Mace is fighting far more seriously.
When Vos sparred Windu he was holding back and was out of practice with a saber. Mace was also holding back, but when Vos began to let loose Mace ended the spar inconclusively. I figure Vos years later in his "prime" could pose more of a challenge to Windu than he did in that instance.
Tiin should be the better duelist though, based on accolades and his spar with Windu. Even if it isn't concrete, it's enough to say he's better than Vos.
Tiin was noted as being one of the most powerful Jedi in the Order at that time and has decent TK feats around Vos' level, so TK isn't really an issue.
__________________ “The galaxy must experience the pain of death and the rapture of rebirth as I have. I will bring chaos. It is time for war.”
Quite a few people are putting Tiin's level of skill into question including luminaries such as Shootingnova, who thinks that Jinn could even put up a fight with him due to lack of exposure of his supposed skill.
He might still take this again, there is no definitive way to say.
__________________ "Happiness is a lie. Life is horror. The light is always dying all across the universe. The last star will flicker out someday, when it does, all that remains is shadow. And I will be its king!"'-Amahl Farouk
Agen Kolar was able to outmanuver and downright STOMP Quinlan Vos. Agen is one of the weaker members of the High Council and should be just below Saesee.
Tiin is a good tier above Vos as a duelist, he may not have many feats, but the ones he does are credible. In terms of Force powers, I doubt that Choke or Lightning is gonna give Vos the win, but Vos' shield was broken by Tholme, who is nowhere near Saesee in terms of telekinesis. Saesee takes this.