Since my earlier professor jayvik rant has been living in my head for few days, I just wanna share how I view they'd act as professors.
Viktor is very kind to his students and helps them out the best he can. He answers questions patiently and falls into long rants because of small innocent questions. He tries to do his best to make the students actually understand the subject, encourage them, and give them opportunities to shine.
However, Vik would be awful in truly understanding how other people think. Even though he thinks he's helping, often he just makes everything even more confusing. But those bright enough to get him, would love him. Viktor wouldn't know what to do with the lazy students or students who don't care about the subject, so he'd just ignore their existence. Maybe at the beginning of his career he tried to ask them if he can help them in some way, but soon realized talking to them is beyond his area of expertise, and let them be.
He isn't social at all and he doesn't like lecturing; lecturing would be a mandatory evil he has to endure in order to stay employed. He likes one-on-one sessions with the students he helps, but he doesn't feel comfortable with an audience. His lectures are strickly to the point and quite boring for those who are not already inspired by the subject. His lectures are moslty a lot of theory and no practice.
Jayce, on the other hand, is all practice and little theory. He does his best to make people care about his subject and always demonstrates things in practice, when he can. He's all bravo and amazes the students with his brillance on a daily basis. Jayce treats the lecture hall as his stage and is always ready to totally bewilder everyone. Mind you: not with his personal drama but actual science! Jayce plans his lectures to the tee and gets ready for them early. He is really proud of the reputation he's gathered around the Uni.
From his students, he appreciates ideas and imagination more than technical knowledge. He encourages them to think outside the box and try new approaches, even if it would result in failure. He gives more points to students whose essays have more original deliberation rather than students with good grasp on facts and theory but no personal insights.
As co-workers and academics, they are also very different from each other. I suppose this part would follow the Arcane canon quite literally, though. Jayce is the one who knows all the faculty and is always pulled to mingle with people, even if he'd rather just do his research. The research, he is really truly passionate about, and knows it will be noticed and well-received in the academic circles. While Viktor is happy to hide way in his lab and let his curiosity run free with no pressure to socialize. He doesn't really care for the glory of academic recognition, he just does it purely out of his own interest and desire to make change.
They disagree about each other's teaching methods, but they still respect each other and the results. Of course Jayce is most comfortable and most himself while he's in the lab with Viktor. All the show and social act he puts up all day tend to get to him, but with Viktor he can just let all his masks down. Vik teases him about it, but never in a hurtful way and Jayce answers to the same measure. Because guess what, that's how actual banter works (looking at some of you fic writers).
They have the most heated academic debates which spread out for weeks. It's never obvious outright fighting but subtly leaving research papers on each others' desks while bringing them a new cup of coffee. Jayce is more verbally argumentative though, while Viktor more passive aggressive, but the debates are never personal and always respectful. They often end up blowing up the lab with questionable experiments just to prove a point.
They'd make a perfect team.