(Climate Question) What if the Earth's 23.45 axial tilt was in the other hemisphere?

[waldronate]

As Redrobes points out, axial tilt direction affects the phase of the seasons (when the north pole points toward the sun it's Summer in the north and when it points away, that's called Winter in the north). The Asiatic low that drives monsoons forms because the heating of Asia occurs only in the Summer.

However, axial tilt combines with orbital variations to drive a lot of the ice age cycles (see Milankovich cycles).

[WoodytheClimateGuy]

Ok, but what if the reversed axial tilt happened at the start? On a video, I heard that a reversed axial tilt allowed the Sahara and Arabian Desert to become savannas. So it would change something, right?