Exact same end result. Usually, if your TM backup is on an external USB3 drive, the import to the new machine using that will be faster than migrating directly from another Mac over ethernet for example. Fastest ever would be if both Macs had Thunderbolt and you use a direct Thunderbolt cable for the transfer. Bottom line is use whatever combination has the fastest transfer speed.Are there any advantages to using a Time Machine backup versus old computer when migrating?
i heard when you install os x that it installs packages that are unique to your computer. so doing a complete mirror from one computer to another is not as reliable as restoring that computer's time machine backup
I think you are mixing migrating with a restore. OP is asking about two different ways to migrate.
Even so, there is nothing special about what packages are installed. As long as the Macs are compatible with the OS X version, a full restore/clone will work fine.