I've tried all of the settings, including the pure direct settings. There is much more bass in all of the settings over the
Sony. Especially the one I mentioned above (SFSSAW) is more dramatic than the others.

Even though the wattage in the specs are the same (between the Sony and Pioneer), there is a very noticeable difference in power.

Comparing Sony STR-DH500 vs. Pioneer Elite VSX-21TXH.