Which are better?
I highly agree with Stevezero.
Don't even consider getting a large scale plane until you have mastered the trainer with the help of an instructor. And then you may not even be ready for a large aerobat.
Anyway, to answer your question.
Gyro: Waste of money on anything but a heli.
Autopilot: All it does is return the plane to a neutral attitude. Again worthless because if you were to completely lose your radio signal the plane would go for several mile before it crashed and you will probably not be able to find it.