not sure about styles, but I would focus my efforts on setting a basic structure to the trunks of these trees while they're still bendable. you should be aware that maples can "bite in" to the wire (in other words, start to grow around it, leaving scars) remarkably quick, so you must keep a close eye on any wire that is applied.
you should also keep in mind other techniques for shaping these trees. guy wires and directional pruning are both equally valuable to wiring, and have their own upsides.
Personally, I would focus mostly on the vigor of these trees for the time being. Wiring a tree will hurt it's ability to grow, so that's always a tradeoff to consider.