I think the 'Preset 1200 x 900 and 321kb' looks the best to me
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Because they've all been compressed on the fly to about the same quality.
In fact the 472kb one isn't compressed (as under 1200x100) and retains its EXIF data.
The others are 133, 279 and 52kb respectively (the last one lowest probably as its mostly grey)
Note that the EXIF data is retained in your pre-set version including camera type Sony DSC-HX50V and GPS co-ords
How are you reading those; also the file size, for that matter, off the screen?
Browser specific.
I mostly use Firefox, where I can right click for Image Info for file size, and I have an add-on called FxIF Data which allows me to right click for the Exif info