If you were ambitious and ran all of the resolution tests along with the three different nozzle sizes with both Skeinforge and Slic3r, you should have 18 surface calibration prints to compare. We are going to take a look at the major differences here.

The most striking difference is between the lowest resolution print and the finest. The lowest possible resolution in our testing utilized a nozzle with a 0.5 mm bore and printed at its maximum height layer of 0.4 mm, as seen in the following image:

The finest print test utilized a 0.25 mm nozzle and printed at a 0.1 mm layer as seen in the following image. Both of these resolution tests were sliced by Skeinforge.

Next we will look at how a 0.1 mm layer is printed using a 0.5 mm, 0.35 mm, and 0.25 mm nozzles. This test was also sliced by Skeinforge.

Next, we'll compare the finest print results of Skeinforge and Slic3r.

In the preceding image, we can see that the top surface area of the print in Slic3r has a little distortion...