They're Mike and Joel, or Kirk and Picard. Both good, but in different ways.
I prefer Cavanagh Thawne right now, because he reminded me how much I love it when you can't tell which way he's going to go. When he's on, he's on. In his scenes you can really get a sense for how dispassionate and cruel he is with his hate, but there's also an infinitesimal tinge of genuine compassion for Team Flash, or at least enough disdain that leads to him not feeling the need to overtly destroy them at any time. You can see him constantly weighing the situation and his options and the outcomes.
Every conversation sits on a knife-edge where he can either lash out and suddenly do untold damage, or just calmly hang out with them and berate them because, eh, what the hell does he care? It's great.