Originally Posted by slo-fly
If you like high speed aerobatics the 12x6 is great. If you like harriers, hovering and such the 13x4 is the better choice. They are both good for all around flying except the 13x4 is slower and will slow dives down better, more climbing power too.
Since my bad vision i enjoy more the harrier arround and slow fly so this weekend i will put on the 13x4 and give a try.