Hi.
These are just my opinions below.
Your colleagues are nuts. I'd never recommend that strategy to anyone for any of the Microsoft exams.
There is rarely any overlap between any of Microsoft's exams. Occasionally you might see a few questions similar to what you've seen in a different exam but they are scarce as hen's teeth.
Compare the outlines to
70-461 and
70-462. How much overlap in topics do you see? One exam is entirely based on writing T-SQL statements. The other is based on SQL Server administration and maintenance.
BTW - Great job on passing 70-462! That is an amazing score that deserves applause. Don't stop the train with a rude awakening (failed exam). I know you will pass 70-461, but only after some careful preparation like you did for 70-462.
Register for the exam three weeks from now (it motivates me to study) using a
free Second Shot code so you can retake the exam for free if you need to.
Good luck!
Best wishes, Davin Mickelson