Tyce comes off as a much worse person than Jace to me, to be honest. Jace has his problems, sure, but he sometimes manages to acknowledge them and make attempts to be better. Those attempts do not last long, and they fail spectacularly, but I give him props for at least trying. Tyce is just one of those kids like the ones I used to watch on that "Beyond Scared Straight" show on A&E when I had cable. He talks a lot of shit and puts on this front like he's the hardest of the hard, but it would crumble if he ever found himself in real trouble.
Both Jace and Tyce have their fantasy projections of themselves, so I guess maybe that was the basis for their "friendship"? I have no idea.