Comparing Fish-Eyes : Rokinon 7.5mm vs Zuiko 8mm (FOV and look)

I think that may be the final push over the cliff for me to get the Rokinon as my next UWA.  I still miss my ZD fisheye and I will miss the weather sealing, but that Rokinon looks significantly smaller than I expected.  Seems like a great tool to throw in the backpack for when I find myself in an unplanned situation that just screams fisheye.   And if I buy the Rokinon instead of the panny fisheye, I can easily keep saving for a 7-14 for when I'm feeling like a rectilinear lens, while still have some options on the UWA side of things.