Turns are how many times the wire is wrapped around the armature....Winds, single, double, triple, etc. is how many wires are wrapped together at the same rate.

A single wind has more torque than a double, triple, etc...it spools up faster but has less top end. As example, a triple wind has more top end and less torque because it takes more power to spool up but can maintain that power better once it gets up in RPM.

The lower turns (ex: 13T) has more overall power than a higher turn motor (ex: 15T) but also has more amp draw. It'll take a better speed control to operate a lower turn motor as well as better batteries.

RECAP:
The lower the turn, the more power overall
The lower the wind, the more torque