Most of the key points about focal length, WR, FF are covered above - although personally I'm not sure FF is so relevant, as the new FF will have a crop mode, and 1.5 crop is quite useful for macro, especially for the 35mm
I have the 35mm Macro and a F 100mm macro and a 50mm macro. FWIW I decided to buy the "optical paragon" 35mm first. I use the 35mm for close-up/product/flower shots and as a walk around, and it's a fine lens. I use the 100mm mainly for portraits of people and bugs and some landscapes (the F 100mm is also a very fine lens). But the 50mm is the lens I use the most as a macro, by a country-mile. Optically, my 50mm is also the best for super-sharp close ups. I find the 100mm a little long (on crop), and quite tricky to nail close-ups wide open with such a narrow dof, and the 35mm to me is better value as it has more all-round uses. In fact, I could probably do with something like an A 50 or FA 50 macro alone, and be very happy. The 100mm would be first to go, as it's not used nearly so much.
In terms of comparing images, I've taken quite a few during single in challenges with the three focal lengths, and here are my albums if this helps at all.
35mm
https://www.flickr.com/photos/95859572@N06/albums/72157634567317316
50mm
https://www.flickr.com/photos/95859572@N06/albums/72157644855700903
100mm
https://www.flickr.com/photos/95859572@N06/albums/72157653929567868