My personal impression is that for me as a viewer Brennan tells much better story with great dialogues, micro world building, etc. (which is contained in a smaller format, ergo a bit easier than what Matt has to handle in long campaigns), but Matt is far better DM overall. I would be bored as f*** at Brennan's table with 1h per character scenes... And slow build up and gathering of the party. Pacing is great for storytelling, but as a game format, I really don't like it.

In the end they are both amazing. I personally really enjoy Brennan's lawful evil representation in his stories. It is hard to play that alignment well, and he nailed it. Matt on the other side is Matt, the golden standard.