For restoring, does a new hard drive constitute a "new Mac"?

I have a current Time-Machine backup, and I replaced a failing hard drive with a brand new one.
But instructions for restoring an entire system via Time Machine differ, depending upon whether you're restoring "to the same Mac" (Time Machine is required) or "to a different Mac" (Migration Assistant is required).
While I am in fact restoring to the same Mac, if it has a new hard drive, does the OS consider that to be a "new Mac"?
I had trouble restoring from Time Machine, once before -- tricky business with user accounts, etc. -- so it's critical that I do this the correct way, so that I can inherit the existing Time-Machine backup history.

Thanks for the help. Unfortunately your answer is different from mende1's (above). So, I remain confused.  :-/
He says Time Machine will treat it as "the same."
You say Time Machine will treat it as "new."
To answer your questions, The backup is Mountain Lion 10.8.2.
Yes, I replaced the drive, myself, and it's working perfectly. Why is that relevant?
How do I restore the drive and maintain access to my Time-Machine backup history?
Thanks.

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