You can have your better three pt shooter, and ill take the better overall shooter with 120 more points to his name.
Also, the Big 12 only has two teams (KSU, and West Va) in the top 50, where as the Big Ten has 4 (MSU, Purdue, Iowa-wont count them, and Maryland). KSU and West Va are the two. He had a good night against West Va going 3-6, and tough one against KSU going 1-3. He had a great night against Iowa, scoring 19, but then again, if you count that, that would mean you would have to admit Iowa is a good team, so I dont know if that would fit your narrative
Jok, on the other hand, has faced MSU, ranked #7 in 3pt D twice, and went 3-5 both times. Against Maryland, he had his tough one going 2-6. Against Purdue, twice, it was rough, as he went 0-6, and 1-4.
What does this tell us? Not much at all, except the whole "better competition" argument you are making isnt a good one. I could actually turn it around and say that Jok shoots against tougher competition, seeing as though hes shot against a top 50 3pt D 5 times, and Matt twice