[Tom Matthies] “But you get a better levels if you dupe the tracks :)”
“Better levels” may not be the best term, here.
“Increased levels” might be more precise.
(I’m sure that you meant “better” to mean “increased” in this case.)
You DO get about a 3 to 6 dB increased level by cloning the clip on both channels, but that’s not always what you want to do.
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Also, if increased levels and a mono center is what you DO want, you can get the same effect by panning a single channel clip to center and increasing the level on that clip by approx. 3 to 6 dB.