I was asked by one of our MCTs on what are the options for a MCSD .Net to become MCPD:Web Developer & MCPD:Windows Developer IF he/she has already taken 553 & 554 to get MCPD: Enterprise Application Developer
The answer is:
1.) Either take 551 & 552 to become MCPD in Web and Windows Development respectively
2.)Take 547 & 548 to achieve the same...
551 & 552 will cover TS as well as PRO contents of their respective track, where as 547 & 548 will cover only PRO content...
Which option to select depends upon your choice... Make a choice after looking at the Prep Guides of the exams on Exam Prep Guides