I like mayock better cus he is associated with NFL Network instead of ESPN.
Mayock tends to favor guys and just put down others without looking at what they did in college. Instance: Jay Cutler being better than Vince Young. Nice try, never happen. Jay Cutler will be a fine QB, just not the winner that Young is. This is where Kiper can be better sometimes, he leaves himself open for a while and can change his opinion whereas Mayock tends to lock in and stay locked in.
Mayocks lisp is annoying and yes he does come acrossed as arrogant but arrogance is not correctly defined in this industry. Arrogance is just saying everyone else is full of it and your opinion is the only one that matters. I dont think these guys are like that, they just have conviction about what they say. In the earlier years, Kiper was considered arrogant but he like most people change as they get older.