  The relation between logarithmic corrections to the area law for black hole
entropy, due to thermal fluctuations around an equilibrium canonical ensemble,
and those originating from quantum spacetime fluctuations within a
microcanonical framework, is explored for three and four dimensional
asymptotically anti-de Sitter black holes. For the BTZ black hole, the two
logarithmic corrections are seen to precisely cancel each other, while for four
dimensional adS-Schwarzschild black holes a partial cancellation is obtained.
We discuss the possibility of extending the analysis to asymptotically flat
black holes.
