I agree with Carla that it never hurts to do your own experiments but a lot of testing has already been done. I am not sure I can point to any comparison of all the software and online services but I have tried many of them myself.
I have tried the online services Arc3D, My3DScanner, Hypr3D now Cubify Capture, 123D Catch - including several that were purchased by AutoDesk - and others that either no longer exist or are not free. I have used several traditional, high end photogrammetry softcopy systems as well as several free Bundler/SfM variations from PhotoSynth to VisualSFM. I also have many, many hours using several, somewhat non-traditional, commercial photogrammetry solutions - those being PhotoModeler Scanner, ADAMTech, and Agisoft PhotoScan.
I can tell you that all the above can deliver some truly stunning results, visually. However, not all the results are equal with regard to precision, accuracy, and repeatability. Having said that - they all are getting better and better.
I don't claim to have all the answers, nor do I claim to have tried everything. I am also truly excited by all the options that are available these days with more showing up constantly it seems. It is difficult and time consuming to try and test everything.
So, what do you want any testing to accomplish? If images are acquired properly - and for the most part the requirements are the same, with a couple of exceptions - then they all work. What do you hope to actually compare?