I wonder, in the light of the new naming, whether these 2 get from now on a different update cycles i.e. the CC starts to get new features as soon as ready, the perpetual version only when it is decided the new version comes out.
For my personal preferences and I suppose for plenty of other users the LR is the only app what is needed.
For that there is apparently no option in the CC land, you get PS in addition whether you want it or not (using the LR only the monthly rental is suddenly much steeper).
As photography apps get more mature, there is much less need for a special software tailored to image artists.