Yosemite Valley is deceptively large. You start out with views of Bridalveil Falls and El Capitan, and slowly start to see Half Dome, Yosemite Falls, Vernal Falls, Liberty Cap, Glacier Point. and various other places along the way.
Wawona is on the South side of Yosemite. It includes the Mariposa Grove of giant sequoias as it's main attraction. There is however much different views of the park, then you would get out at Glacier Point, or from the Valley.
In February of 2016 I took a trip to Yosemite to try and see the famous Firefall that happens on Horsetail Falls. The weather was nice for it, but the flow of water over the falls wasn't. The park itself was nice covered in a small blanket of snow in parts of the valley. The high country had more. Up in the Tuolumne Grove there was a nice base of at least 12 inches of snow.