Well, they look to have around 15-20% more crit than you do. Also, any reason why you are only casting Phoenix flames half as much as they are?
The crit/RnG (cant be helped) but no one needs to tell you more, crit, more procs > more pyros.
They are also casting more FireBlasts, I had a mate who didnt realize he could cast FB dueing casts.
The 2nd guy seems to have alot more Mastery.
What stats are you running Crit/Haste/mastery im guesisng they are like 60/5/18, you probably have alot more haste.