Two Not So Identical Fisheye Photos

I'm having great fun trying out my new 10.5 mm Fisheye lens in different scenarios. An ultimate decision one must make in Adobe Lightroom is whether to have the lens correction algorithm applied. Here are two "identical" images, though the first one is without the lens correction and the second one is with it:

Assorted HDR Images of Vancouver's Torch Cauldron

Here are several versions of a fisheye photo of Vancouver's Olympic Torch Cauldron. This first one is the "original", albeit first processed in Adobe Lightroom:

All the rest are HDR images that were generated with Nik Software's HDR Efex Pro:

Vancouver's Olympic Torch Cauldron

As seen through a Fisheye lens: