I tend to use to 10-24 more often for landscape/seascape due to the additional width. The F/4 with the OIS makes it possible to use it hand held until the second sunset. 16 mm isn't really that wide, but the F/1.4 makes it better for general photography especially in dark situations or for bokeh. It's good for close ups as well. Non of them would be a bad choice.
At least this is my experience from using these two lenses so far.
https://www.flickr.com/photos/leifbr/