Here we go, the other half of the Oracle equation. Ages had to do with the flow of time, while this one has to do with the passing of seasons. Which is also time. Er...
Well, point is, while Ages had you bouncing between past and present, this one has you bouncing between the four seasons (in the present, I guess) to affect your surroundings. So basically, Link can control the weather. Which would be really cool in real life, especially when we just had the hottest month in Earth's history.
While Ages is very difficult and puzzle-heavy, this one is on the easier side and combat-centric. I vastly prefer this game. Seriously, Ages was hard to enjoy. Onward and upward though.