Why is it $10/Mon. for The CC photography Suite, And $20/Mon. for just Photoshop, What is the Difference Between the Two? Photoshop is all I need. But I have Misunderstood Your Pricing Options,
These FAQ's may help. The photography plan will be cheaper even if you don't use Lightroom, but the single app plan gives you more storage.
Note: the Photoshop Photography Plan mentioned in that link no longer exists.