For general chem and orgo
The science chapters are EXACTLY WORD FOR WORD THE SAME:..... there are 2 difference tho
1) the white book has end of chapter questions... where KBB doesn't
2) the KBB is in color print, the white book is black&white
For Biology
there are some content differences between the chapters (not alot but some here and there). I am referring to the white book having more content. And also, the white book has end-of chapter questions (just like I explained for general chem and orgo)
For PAT
From what I remember, they were both exactly the same
For QR
Both were the same
For Reading comp
The KBB has 3 practice passages, where as the white book has the same 3 but an additional 6 (total of 9 passages for the white book)
By the way, Kaplan white book = Kaplan review notes