Interesting question...
Generally a "4 season" tent has more pole support and better weather protection then a 3 season counterpart.
The Akto for many is a good compromise between weight and extra protection.
However as it is with compromises, some find it too warm (not enough ventilation) in summer and it is not that good under heavy snow.
So often it has to do with perception.
You will see people raving about using an open tarp in winter too, others find a tarp tent (or a Tarptent) too breezy most of the time.
The Moment has a lot more air flow than the Akto and that means less wind protection.
One point that many disregard is that at the same temperature we feel colder when the humidity is higher at low temperatures, below about 53f, but warmer above that temperature. So a tent that is prone to condensation will feel colder in winter and warmer in summer...
There is an index devised to give a close to how it feels to us temperature, and that takes in account wind chill as well as humidity levels, it is called RealFeel by:
http://www.accuweather.com/help.aspFranco
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