The argument here isn't over which is more efficient, that will change as technologies improve in both solar and wind energy, it's over how you compare them "under the same circumstance". The criteria for the two sources is so different that they can't be compared.
Take my situation as an example, I live in a valley, surrounded by mountains and almost completely sheltered from the wind. Even when a violent storm hits my area, barely a leaf moves here so wind energy is most definately not an option (I wish it was!). However, I have a 65kW solar array which works very nicely in the sunshine. I'm fortunate enough to face south down the valley with a wide view of the Sun's path durg the day. So solar is by far the best option here. If I moved a few Km north to the other side of the mountain, the situation would be reversed, I would be in shadow all day and be hit by Atlantic winds.
Without defineing "circumstance" the original question means nothing.
Brian.