Hello,

If you are asking about the booms then, 

70% of the bothe the books are same. 
Fundamentals of physics and principles of physics same in text
There are lot of problematic qns in fundamentals of physics compared to principles of physics
Principles of physics do not have the indications

• difficulty level of problems indicated by number of dots(usually -easy.avrage . difficult)
• Flying circus of physics indicated by aeroplane
• SSM
• GO(online solutions) 

Except these it is same
It is better to choose fundamentals of physics compared to principles of physics.

Hope this helps....