Konqueror is a marvel. Too bad that KDE is now pushing that brain-damaged piece of code, Dolphin.

Dolphin is actually pretty much aligned with Konqueror.

Konqueror can open up anything using KDE's KParts. Applications and libraries provide different KParts and Konqueror is just a shell that can open them all.

Dolphin is Konqueror's KPart provider for file browsing.

So basically Konqueror's file browsing capability is provided by Dolphin.