When comparing small jpeg pictures, one can just have a rough idea about vignetting, bokeh, distorsion. About bokeh, I think it is clear how good the bokeh of 100/2 Makro-Planar is, being similar to that of a Gauss-type design lens such as the AI 105/2.5.
Now, seriously speaking, do you think that - after I have seen how my 100/2 ZFperforms - I continue to use it instead of swapping it for a used 105/2.5 because I have money to through away?
I can tell you that, after I saw the performance of my ZF 100/2, I sold the AIS 105/1.8 ... and I loved the 105/1.8 ...
But probably I am not able to judge lenses as other people believe they are (on the basis of small jpegs posted in a Forum). I just compared full-res, raw files processed by NX2 ...
Take care,
R