A chandelle is a turn through 180 degrees, as is a wingover - except in a chandelle you are climbing throughout the whole 180deg turn and roll out at just above stall speed at a higher altitude tha you started with. In a wingover the climb is stopped after 90deg of turn and allowed to develop into a dive, so that you come out with approx the same speed and altitude.
In powered aerobatics at least, the wingover is not considered an aerobatic maneouvre, but is used as an expeditious way to change direction 180degs without a loss of energy state, and also allows a great lookout into the turn in the direction of the next manouvre...