adobe photoshop cc

http://www.adobe.com/hk_en/creat ... CJRBTZ&mv=other

photoshop + lightroom $68/month
photoshop single app 反而 $148/month

請問兩者有乜分別?creative cloud 2gb vs 20gb?fonts?

另外我有兩部mac,可否用我adobe ID同時裝晒兩部機?