John, I have both Stars and Planets, and Southern Sky Guide. S&P has less objects than SSG. More pages, but less stars (mag 6 inst of mag 6.5) and DSOs. Although there is the odd planetary in S&P that is not in SSG, there are a lot more objects in SSG that are not shown in S&P, especially galaxies.
Good thing about S&P is more thorough descriptions (a separate section for each constellation) and photos.
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